The sound Andrew made as Jack got into his jeans and then slid them off down his legs could have been removed and superimposed over other situations, ones where maybe Andrew could have had a gun to his head, or been suspended over a chasm, or any other situation where he was just terrified.
Jack paused and Andrew got a hold of himself long enough to nod a little to Jack's question, but then his insecurities slipped out before he was able to stop them. "This is going to change everything." he said, his voice small. "We're ending."