Yeh, it was a very close call for Peter. Another inch and he'd be a gonner! Super hearing eh? Not sure I'd like that, I'm sure it would drive you mad. Maybe that's what Sam meant about the headaches. I'm sure hearing all of that noise would give you a super headache too.
I liked the end part where Peter and Walter's bond got stronger. We know that Walter went to the same lengths to get his son back, but at least his efforts worked out better than the scorpion baby!