Original raiser is playing very loose, so hes not really a concern. According to PT, I only have 55 hands on mattwut1 so I cant really determine how he plays, so what do I do in this spot?

pokerstars Game #27154152359: Hold'em No Limit ($0.10/$0.25) - 2009/04/16 12:16:46 ET
Table 'Phaetusa' 6-max Seat #5 is the button
Seat 1: mattwut1 ($32.30 in chips)
Seat 2: BiG BaLLiN 1 ($25.70 in chips)
Seat 3: AK47-4EVERY1 ($43.50 in chips)
Seat 4: Aaaaarrrgggh ($26.70 in chips)
Seat 5: Dollarjoe ($13.75 in chips)
mattwut1: posts small blind $0.10
BiG BaLLiN 1: posts big blind $0.25
*** HOLE CARDS ***
Dealt to BiG BaLLiN 1 [Qs Qc]
AK47-4EVERY1: folds
@@mok@@big@@ leaves the table
Aaaaarrrgggh: raises $0.75 to $1
Dollarjoe: folds
mattwut1: calls $0.90
BiG BaLLiN 1: raises $2.50 to $3.50
Aaaaarrrgggh: calls $2.50
mattwut1: raises $7.50 to $11
BiG BaLLiN 1: ?

His raise really got me confused, could he have smooth called a monster hand PF? Did he see a spot to squeeze and go for it? I think I just have to push, and if hes got me beat, then he outplayed me..

What do you think?