I can see him folding a FH "knowing" villain has the quads

Just stop slowplaying or playing scared. That's the advice all the best players here gave me, and it improved my game a lot. Bet your big hands, villain will either have a hand or he won't and you're building a pot. If something unlikely like a straight happens, oh well. Looking at my PP in poker tracker it's almost all wins for big money, with occasional loses to straights and very occasionally a flush. Since most of the time we're good here, we lose money by folding in the long term. Check this FTR article out: http://www.flopturnriver.com/Biggest...ret-Poker.html