No way I fold that hand. Chances of him having 2s 4s have to be so slim that folding that hand makes it a loosing play in the long run. I don't claim to be a numbers guy though, so I could be wrong. Also according to Cardrunners, Overbets are made more to get you to lay down your hand than play it. He most likely lost some good money by pushing there. He could have taken most your whole stack if he hadn't played it that way.