A very drunk man goes into a bar and orders a drink. The bartender serves him and asks him if he would like to try the bar game of darts. Three in the bulls-eye and win a prize. Only a dollar for three darts. 

The drunk agrees and throws the first dart. A bulls-eye!! He downs another drink, takes aim on wobbly feet, lets go...Two bulls-eyes!!!! Two more quick drinks go down. Barely able to stand, he lets go of the last dart.

Three bulls-eyes!!!

All are astounded. No one has ever won before. The bartender searches for a prize... grabs a turtle from the bar's terrarium and presents it to the drunk as his prize.

Three weeks pass...

The drunk returns and orders more drinks, then announces he would like to try the dart game again. To the total amazement and wonderment of all the local drunks, he scores three more bulls-eyes and demands his prize.

The bartender, being a sort of drunk himself, and a bit short of memory, doesn't know what to give, so he asks the drunk, "Say, what did you win the last time?"

And the drunk responds, "A roast beef sandwich on a hard roll!"