Putting a maniac on a hand

[PrayingMantis]

20+2$ 2-tables SNG on stars. Well, the fish have finally arrived!!

2 first hands are pretty quite. I fold trash. Minor action. third hand: LP goes all-in. all fold. Fourth hand: same guy, all-in! All fold.

Fifth hand...

I get TT UTG. I limp to see what's coming. Maniac is MP now. another EP limper, 2 fold, and then, the unbelievable happens. MP maniac goes all-in! All fold to me.

OK, he didn't do it *every* hand, this is only the third time out of five, so this guy must have *some* standarts. But what? What hands do you put him on? There's a big possibility I'm better than 2:1, maybe much better. Is it good enough, this early? So, Do you take him, or leave him to another player?

PrayingMantis