Jeff may get this, but only because he's an expert.
Your partner opens 1H, RHO overcalls 1 Spade and you hold
Jxx
Axx
xx
Q9xxx
Whatever do you do? How do I know that this is a tough bidding problem? Because my online partner, who clearly identified himself an advanced player, got it wrong. Did he support hearts? Oh no, he did not. He bid 2 clubs
I can portray myself as a basketweaving expert, or Le Bron James, or whatnot online, and nobody can dispute me. You can fudge a little here and there on bridge, but really, if you claim "Advanced" then I hope that you can at least keep up the appearance for two hands. His first hand, with two points, he played well. And although his bidding didn't turn out so well (failing to double blackwood bid for the setting lead), I can totally sympathize. In a sane world I'd claim "intermediate," but given that I can find my Merrimac coups mere seconds after I play the wrong card, I feel I'm entitled...
(That prior hand saw an "Expert" open 1NT see his partner bid a game without expressing slam interest. Said expert invoked blackwood and found his partner with a perfect 13 count that could have splintered.)
Update -- And because Jeff may ask, I opened in second seat, not 3rd.