Search:

I'm probably not opening 50% on the button, especially vs a maniac. If I was, this would be one of the first hands I'd trim vs a 3b.

4b pre is definitely better than calling.

I'm not sure about stacking flop, seeing as I only really consider his overpairs to be getting it in, which we're not favourite against. Our fold equity...

This is a really bad call pre flop, and you're now faced with two horrible options as a result.

edit - ok we have a straight draw + top pair, not just a shitty top pair, so calling isn't horrible....