I bet you need it? Er, wtf does that mean?

$1/$2 No Limit Holdem
5 players
Converted at weaktight.com


Stacks:

UTG		($296.10)
Hero		($341.65)
BTN		($440.80)
SB		($97.70)
BB		($295.65)

Pre-flop: ($3, 5 players) Hero is CO

1 fold, Hero raises to $6, BTN calls $6, 1 fold, BB calls $4

Flop: ($19, 3 players)
BB checks, Hero bets $14, BTN calls $14, BB calls $14

Turn: ($61, 3 players)
BB checks, Hero bets $34, BTN goes all-in $420.80, BB folds, BTN says "i bet you need it...", $287.65 to Hero ($287.65)?