Reason #7 why not to be an annoying smacktard

Freeroll shootout last week and we had this goofball at the table basically annoying the crap out of everyone. He was a quiet guy, just taking forever to decide on calling or folding preflop, acting out of turn, not paying attention, etc. About an hour in, he goes heads up with the guy sitting in BB. It gets to the river, board shows 3 hearts and an ace. The good-guy checks, smacktard immediately goes all in (he's the chip leader at this point). Other guy starts thinking about it and then the annoying guy says "Here', i'll make it easy on you" shows an Ace of hearts. BB then says "show one, show all" (which this establishment doesn't have this as a house rule). He protests, then someone says "yea... show one, show all, you have to do it" and a couple of others nod in agreement. He angrily shows the other hole card which is an unpaired spade. BB calls with his Ace better kicker.