[adanthar]

If you play it this way you should be prepared to reraise all in. However, the 150 raise suggests a TT-QQ type hand that doesn't really want customers, but is better than 50/50 against you. (I would also say AK-AQ, but these are less likely than normal, both because you have AK and because AQ won't put this many chips on the line against an EP limper and a guy that'll call any bet PF and may or may not catch any piece of the board.)

If you think the maniac will call an all in reraise, go all in. If not, I think you can probably find a fold here somewhere (although I'd hit myself on the head and call anyway...oh well.)