When they (Mel Gibson and Robert Downy Jr.) crash in the jungle and their chopper is hanging from the canopy, they decide to just fall out. When they fall they seem to also decide to switch places. Mel falls out from Robert's side and Robert falls out from Mel's side. (Mel was, in the chopper, on the right, and when he fell, then the left. Robert was on the left and when he fell, then he fell out of the right.)