JJ strange preflop action from villain, facing flop shove

[winningfish]

$2/4, 10 hands into session, villain in CO seemed sensible so far, $550 effective stacks

Dealt to Hero [J[img]/images/graemlins/heart.gif[/img] J[img]/images/graemlins/diamond.gif[/img]]

Hero raises to $18, CO calls, BU raises to $50, 2 folds, Hero calls, CO raises to $110, BU calls, Hero calls.

FLOP: ($336) [K[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/club.gif[/img] 3[img]/images/graemlins/heart.gif[/img]]
Hero checks, CO bets $428 (All In), BU folds, Hero...

Villain's shove took about 20-30secs, prior to this he's been playing fast.

[Darkfolder]

WTF? Fold

[FireStorm]

Please for the love of God fold.