[sfgiants]

I would check/fold. Many things have to go right for this bet to work - any A2 would have to be folded (which is unlikely, IMO), and you have to dodge the probability of getting counterfeited with an A or 3 on the turn or river, and you could possibly get quartered by another A3. The eights are unlikely to be ahead for hi, even if you fold out someone with top pair, since random two pairs happen all the time in this game. So yea, check/fold for me.