when did I grow balls?

[TheBlueMonster]

Party 2 table tourny, down to 5.
Hero is utg (t3600)
villian is BB (t2700)
blinds: 75/150
dealt to hero: A [img]/images/graemlins/spade.gif[/img]10 [img]/images/graemlins/spade.gif[/img]
hero raises to 375.
BB calls.

flop: 4 [img]/images/graemlins/diamond.gif[/img]8 [img]/images/graemlins/diamond.gif[/img]3 [img]/images/graemlins/spade.gif[/img]
BB checks, hero checks.
turn: Q [img]/images/graemlins/diamond.gif[/img]
BB checks, hero bets 350. BB raises to 800. Hero raises to 1800.
BB thinks for a few seconds and folds, swears he'll " get me later"

seriously, when did I grow a pair?