you're severely dehydrated and malnourishedded. great combination of things. >> seems like something all of us -- and you've been up there four times to do that. we also have a photo of you with your imax camera. you're with a colleague here. how much does this camera weigh. >> the top part weighs 24 pounds. to hold a big camera like that still you need a 70-pound tripod and head. it uses 4.5 pounds of film, 500 feet of film in 90 seconds. >> so how much film did you have to take to the top of mount everest. >> i took one roll to the very stop. >> it was two weeks after the blizzard when eight people died that you actually did make it again to the top of mount everest. and in your travels when you were trying to help, this is one of the bodies you discovered. who is this? >> we don't know who this was. the bodies we found were higher up. but this photo is in our book just to illustrate the fact that with this increased number of people climbing on the mountain there's more accidents and it's grim thought but that was just an anonym