I think I 3-bet 4th here. If I don't do that, I'll probably check/call down. I wonder if the raiser would bet out fifth - it would be useful to know in putting him on a hand. Also, if it gets checked round you don't lose much against a pair & draw hand. I probably call 6th and 7th and expect to lose, but I think you could have got the guy that caught the ace out on 4th.