you get a pint glass to make drinking with the homeless man more interesting...you also develop an irish accent. *shamrock coin*
you develp a strange urge and sudden talent for river dancing that matches your newfound irish accent *ancient irish coin* (sorry, i don't know what its called)
You receive...a mars bar, clearly the vending machine is running out of leprechauns...sorry *A dozen dancing, irish leprechauns compressed into a coin the size of...a coin.*
you get a plastic water gun...velocity depends on how fast you can keep squeezing the little plastic trigger before it falls off *soaking wet coin*