Aaron Villakazie, a student assistant funded by the Canadian International Development Agency (C.I.D.A.), was probing a subaqueous mudboil adjacent to an island in Kaminak Lake with a pointed steel bar, when his foot became trapped in till as he attempted to pull the bar out of the bottom. As he struggled to free himself, his left foot sank further and further, until he was waste-deep in water that had been a few inches deep at the start of the incident. Several people, flown in to the island in our helicopter, worked more than two hours, without success, to free him. The cause of his predicament was that, as his foot sank in the saturated mud, his weight, transferred to the mud at the sole of his leather boot, increased the pore water pressure in the mud, causing it to pass above its liquid limit (12.4% water by weight), liquefying it. As his foot descended, the mud above his foot, because of the limited plasticity index of the till in this area (<1%) set to cement-like hardness, preventing him from moving his foot. Even though his colleagues attempted to excavate the material around his leg, it was not possible to keep the excavated mud from flowing back into the depression around his leg, and setting up solidly again. This is the same characteristic of mudboil soils in this region illustrated graphically in images 0065, 0095, and 0096 and described in the caption for image 0240 and in Shilts, 1974. Despite the efforts of seven men, Aaron sank almost to the frost table and was extricated only after the rigid sediment around his leg was excavated hydraulically using a portable, high-discharge water pump (see images 0196, 0197, 0198, and 0157).