Spoiler alert: EXACTLY the same as it did the day it was purchased in 1999. Doooooooooood.
A man apparently was going to keep the burger around for one month, then forgot about it...until he pulled it out of his pocket 14 years later. OMG EW WHY DON'T YOU CHECK YOUR POCKETS.
The burger was practically the same. It had hardened, but there was no mold, no decay.
Well, except for the pickle.
Source: oldesthamburger.blogspot.com
This makes you wonder...will McDonald's hamburgers outlive us all?
Source: oldesthamburger.blogspot.com
Via: huffingtonpost.com