I recently bumped into @Quroe in a random YouTube video comments section.

Has a similar occurrence ever happened to you?

"In the wild" here means in a context with no significant link to prediction markets. "Non-famous" here means they don't have a Wikipedia page or any online account with >100k followers. "Randomly" here means there was no known reason to expect significant likelihood of meeting them e.g. they weren't someone you originally met on that website who you got to join Manifold later, you didn't specifically search for an existing Manifold user on that website etc.