And I'm not talking about sitting front row at a Gallagher show (damn that dude is 74 years old now). Anyway, I had a watermelon sitting off to the corner on my counter and just noticed it was spewing white foam out of the top of it. Had no clue what was going on until I Googled it, but apparently they can get yeast infiltration in them and ferment inside until the pressure builds up and looks for an exit. Science and shit, yo!
Yes! When I was nannying for my neice and nephew years ago I heard a giant thump from upstairs. I grabbed a bat and started the investigation. Turns out the watermelon actually exploded - not just yeast foam, but blew apart with chunks everywhere. I wish I would have seen it.
This is why you should always drill a hole in your watermelon and insert at least 200ml of vodka before consuming.