filmmaker michael churton said he watched as the wall of ice approached .
the 38-year-old from new york then told his group to get down .
he said : ` it was about 4,000 feet of snow ... there was nowhere to run '
hoping for the best , he lay down and got into the fetal position .
the force of the oncoming snow caused him to slam into a rock .
he dug himself out and then looked for colleagues and other survivors .
another survivor said avalanche was ` something out of a hollywood movie '
at least 17 people who were on mount everest at the time have died .