I believe this used to be an actual method of determining whether someone was a witch. Hell of a troll thought that one up. Whether or not this is mostly hearsay and legend, I’m not really sure. I didn’t get to where I am today by fact checking. I do know that they sometimes tested a person’s testimony by having them eat cake. There’s even a recorded instance of a man choking to death on a piece of cake, presumably because he’d been telling porkies. Now that’s natural justice, right there.

↓ Transcript
A bunch of medieval villagers have gathered at the edge of the village pond. A tightly bound witch is being rowed out to the middle of the pond. One of the villagers addresses the others. “You all know the rules: if she sinks, she’s innocent. If she floats, she’s a witch.”

The potential witch is tossed into the pond with a loud splash.

She desperately flails about trying to sink, but it’s to no avail.
“I’m sinking! I’m definitely sinking.
Shit… I’ve got a gassy stomach, God dammit!”