I have had it happen with beer I put in the freezer to get cold. Take them out and open them and suddenly it is all slush.
That is really neat. I’ve heard of super-cooling but hadn’t seen it in action.
So how do you cool something below the freezing point without it actually freezing? Stuff in my freezer just, well, freezes.
I left a bottle of beer in a hotel room fridge overnight once. Apparently it was turned down way too far, because at some point during the night, the bottle burst, simultaneously releasing the supercooled beer and causing it to crystalize. What I discovered when I opened the fridge door the next morning was not unlike the reactor core breach Data and Picard discover aboard the Enterprise in the TNG episode “Timescape.”
I’ve never tried freezing Gatorade, but I did have a similar thing once happen to a bottle of carbonated mineral water I left in the freezer. When I took it out, it was still liquid, but when I popped the cap, it started crystallizing, as if by magic, similar to what other posters here have described.