$55 - Call turn with gutshot and second pair?

[Bubblefish]

Villian raised 5bb from UTG+1 with A8s at L2. He also pushed about 40 bb after a min raise and a call at the same level. He is probably both loose and aggressive?

PartyPoker $55 Speed Tournament, Big Blind is t100 (7 handed) Converter on pregopoker.com

UTG (t2430)
UTG+1 (t5220)
MP1 (t2640)
CO (t1490)
Hero (t2850)
SB (t2100)
BB (t3270)

Preflop: Hero is in Button with J[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/heart.gif[/img]
Hero calls t100, SB calls t50

Flop: (t300) T[img]/images/graemlins/heart.gif[/img] 2[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/diamond.gif[/img] (7 players)
<font color="red">BB bets t100</font>, Hero calls t100

Turn: (t500) K[img]/images/graemlins/diamond.gif[/img] (7 players)
<font color="red">BB bets t400</font>, Hero?