With someone that loose, I'm guessing he's either got something suited or spiked a pair. I'm not sure I want to find out with a pot this small. Leading the turn after your flop raise indicates strength, unless he's shown that he's irrationally aggressive postflop (sample size is too small for an accurate AF).

With nothing but overcards and a small pot, I'd probably play it the same way. But watch him - if you see him betting like that with junk, you're going to want to call him down/reraise him more often.