Two fun hands from yesterday

[Bulldog]

I play in a regular home game, and we had a 30+ person tourney last night. Here are two hands I'd like any feedback on:

50/100 tourney hand (starting stacks 2500, this is level 3), a MP player limps and it is just he and the BB to the flop. They check it twice and the final board is QA324. BB bets 100 into the 250 pot, and MP calls him with 96. Out of 91 possible hands, the ONLY hands he could beat were 87, 86, and 76. Somehow the big blind had 86.

25/50 hand, I'm on the button. UTG limps, two more limpers, I make it 150 with AsQc. UTG calls as does the big blind and one other, so we've got four to a flop with about 700 in the pot. Flop is K72, all spades. UTG opens for 500, all fold to me. I push in for about 3000 more, got him covered by 800 or so. He folds 22 face up.

[Cumulonimbus]

I think this is a bad fold on his part; most players that make moves like you did either have a high pair that they want to defend against a spade draw, or a high spade themselves that they'd like to semi-bluff with(the Ace in your case.) I would have assumed my set to be the best hand, and if I was down to a flush, I still have 7 outs to the turn and 3 more outs to the river.