Hand #1. It's getting to a point where making a standard raise and continuation bet is going to leave you almost committed. At this stage of the tournament small pairs are bad hands to have. If you're playing for third, then fold it PF.

Hand #2. Has button been particularly aggressive? He could be raising with any two here if he's seen how weak you have become on the bubble. If you fold here, and UTG doubles up you're going to regret this fold. Personally, I like to take matters into my own hands and push this ALL-IN. Double up THEN I wait for the short stack to bust and push on from there. My opinions anyway.