First hand to me looks like the guy caught his ace and got scared because fnord represents the set. fnords hesitation makes the guy think he doesn't have the set on the flop so he raises big trying to throw him off. By calling quickly then calling on the turn buddy is now scared that he's been out smarted. His check seals his fate. Pretty ballsy hand I'm thinking, you obviously put his range above having a 9 in his hand and you went with it.

2nd hand the guy is a lag so the check on the flop isn't bad. I would probably lead out on the turn to keep him from sucking out on me, but the hesitant bet on the river shows he's scared of the ace, so he doesn't have a set. I'd call there too.