5/10 PL bottom two HU

[Dale Dough]

Live game, we've been playing like 10 hands, nothing unusual has happened. The guy seems to be on the TAG side and not a professional - but that was when we were playing 6-handed, game almost died when three guys took off and the fourth thought it was too shorthanded (w/e). I have more information now but didn't have it at the start of the hand.

He has just a little under a thousand. Completes his SB, I check with 5[img]/images/graemlins/spade.gif[/img]4[img]/images/graemlins/diamond.gif[/img].

Flop: 7[img]/images/graemlins/spade.gif[/img] 5[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/spade.gif[/img]
Pot 20

I check, he bets 20, I make it 80, he repots to 280 (Yeah I know, dealer screwed up. Not relevant.)

Drop it?