Seeing as everyone enjoyed the analysis of that hand, here is his winning hand from the 1980 WSOP against Doyle Brunson.
http://www.pokerverdict.com/WSOP/Classic-Poker-Hands/1272/stuey_ungar_v_doyle_brunson.html
I think this hand really sums up Stu Ungar.
Had he won only the 1980 WSOP and then not been heard of since, this hand would have been considered just a lucky hand where he peels a gunshot on the turn.
However, as he won 3 WSOP titles, we have to look a little deeper and ask, why did he make this play and what was his thinking.. rather than OMG how lucky is this guy.
It sums Stu Ungar up because he was both a genius and a compulsive gambler. If he saw an edge, however unlikely, he would take it. The edge is the implied odds he is getting on this gunshot. He believes that Doyle has hit his Ace hard and that if he leads out big on the turn (asuming this gunshot hits) then Doyle will stack off. Also the call is expensive, but not so expensive that he is left crippled if the GS dosen't hit.