The D-4s being heavy vehicles, were in difficulties with crevasses right from the start. At one stage Wood said cheerfully, "Let's give the game away after we get a D-4 slotted one more time", expecting just to get a track break through over a hole. The next minute his machine with him in it disappeared from sight — the tail and the tip of the blade caught and held a little way down the bottomless hole. Reiffel brought his D-4 around on the ice with the big machine picking its way between slots like a ballet dancer, and after a lot of work with ice axes, the slotted machine was hauled out.