Hand 3, AJT is a bad flop for QQ. You want to see a showdown as cheaply as possible and hope for a K to fall. You don't want to call very thin because your implied odds are low if you catch a K. Without top 2pair or the straight, you can lose a lot of money when the flop comes all broadways. You want to be the guy that flops the straight and takes the other guy's stack. It is way too dangerous to call big bets here with only second pair.