80 years ago today, a dragon's tail was tickled. (It didn't go well.)

May 21st 1946 was the fatal Slotin screwup with the demon core.

I’m wondering what would have happened if the cover hadn’t been removed from the core after it fell? Would the core have melted? How long would it have taken?

It was 80 years ago today
Louis Slotin made a big mistake.
Held beryllium in his bare hand,
But he slipped and then that was the end.
So let me introduce to you,
Made out of pure plutonium,
Louis Slotin’s scary Demon Core!

Golf clap.