If you’re going to jump through a rickety piece of furniture—a bad idea to begin with, but for the sake of this hypothetical, go with it—you should not launch feet-first, because unlike a butt or belly, your legs and feet will not properly absorb the impact when flesh meets table, and those parts of your body have a good chance of being damaged. This is what happened to one masked Bills fan at a tailgate.
The slow motion video isn’t graphic, but as a warning, it does feature a leg bending the wrong way:
Here it is at regular speed:
That guy should take the rest of the season off.
H/t to Doug