My thinking on the first hand is this. I basically know that he has AK (maybe AQ, but I was pretty sure it was AK) from his preflop play. My all in will isolate him, and he may even fold if he puts me on AA or KK (I'm not counting on this, but there's a chance). If not, I still have a coinflip possibility to win, and I've invested little time into this tournament.

The 2nd hand was just silly, the way it happened. Only reason I posted it.