What's with re-reraise/capping/fold craziness....

Can some one tell me why are we seeing some much of this lately....


To add to the silliness, TheDonator (not real handle) brings $100 to a 10/20 table, plays this and leaves with $10?????

Party Poker 10/20 Hold'em (6 max, 6 handed) converter

Preflop: Hero is SB with 2:heart:, T:spade:. MP :#A500AF(TheDonator)/ posts a blind of $10.
1 fold, MP :#A500AF(TheDonator)/ (poster) checks, CO :#A500AF(buddy3456)/ raises, 3 folds, MP :#A500AF(TheDonator)/ calls.

Flop: (5.50 SB) K:spade:, Q:heart:, 4:spade: (2 players)
TheDonator bets, buddy3456 raises, TheDonator 3-bets, buddy3456 caps, TheDonator calls.

Turn: (6.75 BB) 5:diamond: (2 players)
TheDonator bets, buddy3456 raises, TheDonator folds.

Final Pot: 9.75 BB

Probably had 99 or TT or maybe a flush draw....or was drunk.