[HatesLosing]

I think hand #3 can be interpreted 1 of 4 main ways (of course, it's possible he is just making a VERY strange play with little logic to it but...):

1. He is putting a play on you (misread) or making a semi-bluff on the flop (hence the larger than min raise that has a better chance of possibly winning the hand right then), you call and he says "oh crap.. that didn't work" and slows down. You check though so he feels he needs to at least take a shot at the pot on 5th and hangs his head when you raise.

2. The hand starts off in a similar way, but now he actually gets lucky and improves his hand on 4th (say he has 98 or 99). Now he switches modes of operation and decides to slow play. You check behind him on 4th, so he thinks that maybe you are weak and tries to just value bet on 5th and is pleased when you raise him.

3. Similar to the other scenarios, but this time after the flop he improves but picks up a straight draw (or had the draw but now pairs), gets a free card, hits it on 5th but feels you are weak now so he doesn't bet that much. He's glad you raised.

4. He knows how you play and thinks you might have AK/AQ here and might have missed and knows you will bet strong often here anyway if checked to. He holds something like TT/JJ and says "oh crap" when you call his raise because he doesn't believe you would do that with just AK/AQ and now he turns soft. 5th is then just a blocking bet if he has JJ since if you have AA/KK/QQ/TT he's behind, and he's unhappy when you raise. It's a small value bet when he thinks you are weak if he had TT and he's glad to see the raise.