<sod >Last FridayÃ¢ÂÂs avalanche, which saw 16 Sherpas killed, has exposed undercurrents of resentment in the 400 Sherpas that work on the mountain, and has led to many of them deciding to take action by boycotting expeditions and leaving the mountain.< eod>< sod > An avalanche last Friday, in which saw 18 Sherpas were killed, has exposed undercurrents of resentment in the 480 Sherpas that work on the mountain, and has led to many of them deciding to take action by boycotting expeditions and leaving the mountain.< eod>