WTF is this guy thinking?

Full Tilt Poker $0.50/$1 No Limit Hold'em - 9 players
The Official DeucesCracked.com Hand History Converter

CO: $33.10
BTN: $100.00
SB: $80.35
BB: $115.55
UTG: $136.10
Hero (UTG+1): $100.00
UTG+2: $77.90
MP1: $35.50
MP2: $197.30

Pre Flop: ($1.50) Hero is UTG+1 with 7s 7c
1 fold, Hero raises to $3.50, 5 folds, SB raises to $7, BB calls $6, Hero calls $3.50
SB's min raise lets me in the door. Easy call.

Flop: ($21.00) 7h Td 5s (3 players)
SB checks, BB bets $21, Hero calls $21, SB raises to $59, BB raises to $108.55 all in, Hero calls $72 all in, SB calls $14.35 all in
Fairly safe flop for a 3bet pot; SB has a range of QQ+, but I have NO IDEA what either of them are doing... dry flop and they're both essentially shoving?

Turn: ($280.35) 4s (3 players - 3 are all in)

River: ($280.35) 2h (3 players - 3 are all in)

Final Pot: $280.35
SB shows Kc Kh (a pair of Kings) - I understand your action sir, but take a hint and slow down...happy to see you were drawing to 1 out, though...
BB shows Ks Ts (a pair of Tens) - DUMBFOUNDED! Drawing dead, but putting in 100BBs is a sure way to bankroll ruin!
Hero shows 7s 7c (three of a kind, Sevens)
Hero wins $39.30
Hero wins $238.05
(Rake: $3.00)