read dependent. played perfectly up to the turn which is debatable. the 3 options:

fold - only do this if you have a strong read on the person as never showing a bluff

call - standard move, call down - then raise the 6 on the river

raise - im assuming this is 1/2, right? then raising will not be good unless he is good at making laydowns. i could see people wanting to do this at a higher level because some people will laydown 9's or ace bad kicker even if your table image is right. this 3betting also will most likely give you a free showdown, so it is a goot play at times IMO. the only bad thing about it is that if he really is checkraising with air, then you don't get the bluff river bet that he would give

IMO this should be a 97% calldown at 1/2