Metal stool scrape and drag on shingle stones

[[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0.001,-0.001,-0.001,-0.001,-0.001,-0.002,-0.002,-0.002,-0.007,-0.009,-0.008,-0.006,0.007,-0.005,0.005,-0.007,0.012,0.047,0.052,0.114,-0.118,-0.083,0.071,-0.035,-0.05,-0.033,-0.03,0.032,-0.034,0.043,-0.027,0.021,-0.018,-0.019,0.018,0.017,0.018,0.016,0.019,0.107,0.078,-0.085,0.039,-0.075,-0.052,0.043,-0.035,-0.029,0.117,0.038,-0.055,0.115,0.098,-0.072,-0.064,-0.055,0.046,0.043,0.071,0.074,0.047,0.063,-0.072,0.064,-0.039,-0.047,0.039,0.037,-0.042,-0.04,-0.027,-0.023,-0.033,-0.048,0.043,-0.064,0.057,-0.045,0.076,0.084,0.095,0.051,-0.085,-0.11,-0.065,0.047,-0.042,-0.031,0.03,-0.03,0.035,0.039,0.038,0.025,-0.045,0.069,0.041,0.045,0.046,0.051,-0.049,-0.048,0.061,-0.052,-0.062,-0.049,0.048,-0.056,-0.034,0.045,-0.043,0.037,-0.045,-0.051,0.03,-0.053,-0.042,0.063,0.065,-0.069,-0.066,0.067,-0.037,0.045,0.069,0.056,-0.055,-0.055,0.035,-0.035,-0.041,0.041,-0.032,0.022,-0.033,0.035,-0.017,-0.024,-0.025,0.018,-0.014,0.016,0.018,0.017,0.02,0.021,0.029,0.022,0.015,0.04,-0.051,-0.068,0.059,-0.037,0.032,-0.037,0.039,-0.024,0.033,-0.034,-0.027,-0.019,-0.022,-0.029,-0.022,-0.229,0.374,0.501,0.306,-0.268,-0.232,-0.229,-0.212,-0.183,0.191,-0.196,0.183,0.155,-0.165,0.206,-0.098,-0.179,0.122,-0.138,0.207,-0.21,-0.145,0.18,-0.114,0.086,0.091,0.163,-0.086,0.107,0.093,0.091,-0.085,-0.102,0.093,-0.075,0.074,-0.057,0.055,0.047,-0.037,-0.06,0.071,-0.064,0.055,0.046,-0.051,0.027,-0.022,-0.032,0.035,-0.031,-0.043,0.042,-0.045,0.042,0.042,0.036,-0.023,-0.019,-0.031,0.03,0.033,0.025,0.035,-0.029,0.02,-0.014,-0.016,0.018,0.022,-0.02,0.016,-0.016,-0.022,0.028,-0.025,-0.025,-0.022,0.017,0.026,0.027,-0.024,0.018,0.019,0.017,0.023,0.011,0.012,0.015,-0.012,0.016,0.015,-0.018,0.012,0.011,-0.011,0.012,-0.009,0.007,0.007,-0.008,0.008,-0.012,-0.018,-0.012,-0.022,-0.017,0.021,-0.013,-0.015,0.015,-0.013,0.01,0.015,-0.011,0.007,-0.012,0.01,-0.009,0.007,-0.007,-0.008,-0.01,0.007,0.005,0.008,0.006,0.008,0.004,0.004,0.007,0.005,0.004,0.004,-0.004,0.006,0.006,0.003,-0.004,-0.005,-0.005,-0.005,-0.006,-0.006,-0.007,-0.005,-0.003,0.006,0.005,0.006,0.006,0.005,0.007,0.007,-0.004,0.006,0.007,0.009,-0.007,0.009,-0.01,-0.008,-0.009,-0.011,0.01,-0.01,-0.012,-0.009,-0.012,0.015,-0.015,-0.022,0.028,-0.027,-0.034,-0.023,0.029,0.042,0.022,0.021,0.017,-0.018,-0.026,0.023,0.029,0.049,-0.021,-0.021,-0.025,-0.027,-0.041,0.038,-0.036,-0.051,0.056,-0.039,0.05,0.101,0.168,-0.177,0.184,-0.165,0.104,-0.122,-0.084,0.091,0.075,-0.061,-0.049,0.052,-0.038,0.037,-0.068,-0.044,-0.037,0.035,0.035,0.044,0.044,0.026,0.029,0.027,-0.038,0.036,-0.032,-0.035,-0.038,0.029,-0.023,0.024,-0.023,-0.035,0.023,0.033,-0.026,0.023,-0.033,0.027,0.03,-0.02,-0.019,0.017,0.018,0.014,-0.018,0.017,-0.014,-0.013,0.013,-0.01,-0.01,-0.013,-0.014,-0.01,0.02,0.02,-0.029,0.02,-0.038,0.04,0.038,0.064,-0.051,0.054,-0.059,-0.047,0.042,0.042,-0.031,-0.032,-0.03,-0.019,-0.017,-0.028,0.029,0.022,0.034,0.024,-0.024,0.041,0.03,0.045,-0.045,0.041,0.029,0.035,0.037,0.032,0.048,0.027,0.023,-0.033,0.025,-0.025,-0.038,0.042,-0.037,0.029,0.027,-0.031,-0.018,-0.025,0.022,0.015,-0.02,-0.029,0.023,-0.038,0.023,0.02,0.028,0.026,0.024,0.02,0.018,0.044,0.041,-0.026,0.024,-0.029,-0.029,-0.018,-0.031,-0.03,-0.039,-0.034,-0.017,-0.015,-0.014,-0.022,0.011,0.012,0.017,0.016,0.013,0.014,0.013,0.011,0.012,0.009,-0.007,0.011,0.011,0.007,0.01,-0.005,-0.006,-0.009,-0.008,-0.004,-0.003,-0.007,-0.004,-0.004,-0.006,-0.007,-0.008,0.01,0.007,-0.009,0.01,0.013,0.008,0.01,0.014,0.016,0.014,0.01,0.01,0.01,-0.011,-0.012,-0.006,-0.011,-0.007,-0.009,-0.006,-0.007,-0.007,-0.007,-0.006,-0.005,-0.004,-0.003,-0.002,-0.003,-0.008,-0.005,0.004,0.004,0.004,0.003,0.002,0.002,0.002,0.004,0.003,0.004,0.002,-0.003,0.003,-0.002,-0.002,-0.002,-0.004,-0.004,-0.003,-0.003,-0.003,-0.003,-0.002,-0.003,0.002,0.003,0.002,0.003,0.004,0.004,0.004,0.005,0.007,0.009,0.012,0.012,-0.009,-0.008,-0.006,-0.01,-0.014,-0.017,-0.01,-0.011,0.011,-0.009,-0.01,0.01,0.007,0.009,0.008,0.012,0.014,0.018,-0.019,-0.019,-0.014,-0.013,0.013,-0.016,-0.016,-0.012,-0.016,-0.012,-0.011,-0.017,-0.014,-0.01,-0.024,-0.024,0.018,-0.019,-0.023,0.016,0.019,-0.017,-0.014,0.016,0.017,0.017,0.01,0.014,0.014,0.013,-0.012,0.014,0.01,-0.012,0.012,-0.007,-0.01,0.007,-0.006,-0.009,-0.008,-0.007,-0.007,-0.005,-0.007,0.007,-0.006,0.006,0.006,0.005,0.007,-0.006,-0.006,-0.005,-0.008,-0.007,-0.007,0.007,0.005,0.005,0.007,0.009,0.01,0.008,0.01,0.008,0.01,0.007,0.006,0.004,-0.006,-0.006,-0.008,-0.008,-0.01,-0.011,-0.01,-0.011,-0.008,-0.009,-0.01,-0.009,-0.005,-0.008,-0.021,-0.016,-0.019,0.012,-0.018,-0.014,-0.014,-0.011,0.012,0.013,0.01,0.018,0.013,0.019,0.02,-0.037,0.084,0.115,0.098,0.136,0.082,-0.071,-0.151,0.195,-0.257,0.188,-0.201,0.186,-0.15,0.136,0.135,0.114,0.09,-0.086,-0.072,0.088,0.067,0.071,0.084,0.11,0.111,-0.096,-0.111,-0.11,-0.099,0.071,0.044,-0.084,0.078,-0.069,0.081,0.063,-0.103,-0.12,0.121,0.15,-0.107,-0.114,0.083,0.076,0.11,-0.068,-0.057,0.071,0.083,0.068,0.056,-0.035,-0.05,0.045,0.044,0.033,0.039,-0.037,0.026,0.042,-0.051,0.041,-0.053,-0.04,0.036,-0.037,-0.022,0.043,-0.033,0.023,0.021,-0.023,0.02,-0.022,-0.02,0.019,0.016,-0.012,0.018,-0.015,-0.014,0.013,-0.018,-0.019,-0.011,-0.015,0.014,-0.01,-0.009,0.017,-0.019,-0.015,0.018,-0.017,-0.019,0.014,-0.023,0.01,-0.015,-0.016,-0.015,-0.02,-0.019,0.022,-0.023,-0.017,0.019,-0.021,0.019,0.022,-0.026,0.032,-0.041,-0.038,0.025,-0.031,-0.02,-0.029,-0.018,0.025,0.025,0.126,0.157,0.157,-0.199,0.162,-0.166,-0.153,0.095,-0.176,-0.148,0.13,-0.154,0.177,-0.163,-0.255,-0.183,-0.176,0.141,0.12,0.102,-0.1,0.055,-0.131,0.055,0.047,-0.065,-0.051,-0.061,-0.042,0.031,0.041,-0.042,0.032,0.03,-0.033,0.053,0.081,0.081,-0.038,0.052,-0.04,0.051,-0.035,0.029,0.037,0.031,0.027,-0.026,0.02,0.02,-0.022,-0.024,-0.021,-0.012,0.012,0.014,-0.008,0.006,-0.008,0.007,0.007,-0.007,-0.007,0.01,-0.005,0.005,0.002,-0.004,0.005,-0.004,-0.003,0.002,0.002,0.003,0.003,-0.003,0.001,-0.002,-0.003,0.002,-0.002,0.001,0.001,-0.003,-0.002,-0.002,-0.002,-0.001,0.001,-0.001,0.002,-0.002,0.002,-0.001,0.001,0.001,0.001,0.001,0.001,0.001,0.001,0.001,0.001,0.001,0.001,0.001,0.001,-0.001,0,-0.001,0,-0.001,0,-0.001,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]]