3.30 +R folded to sb with a4

[MusashiStyle]

what is the standard line here?
fold preflop?

PokerStars No-Limit Hold'em Tourney, Big Blind is t3000 (8 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP2 (t128470)
CO (t149477)
Button (t180522)
Hero (t64492)
BB (t33086)
UTG (t48796)
UTG+1 (t25994)
MP1 (t37398)

Preflop: Hero is SB with 4[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/spade.gif[/img].
<font color="#666666">6 folds</font>, <font color="#CC3333">Hero raises to t64192</font>, BB calls t29786 (All-In).

Flop: (t96078) 6[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

Turn: (t96078) 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

River: (t96078) 9[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

Final Pot: t61972

[Proofrock]

Shoving is standard here. In fact, I think you could turn your hand face up and shoving would still be +cEV.