Ummm... ew, much?
According to The Daily Mail:
"A Utah man has unearthed a hamburger he bought in 1999 - and the sandwich looks exactly the same as the day it was first flipped.
David Whipple kept the fast food meal for a month to show friends how the preservative-packed hamburger would keep its composure.
But he forgot about it, finding it two years later in his coat pocket and then he decided to continue the bizarre experiment."