this one is tricky because I have like fifty easily qualifying answers, but going to go with singing on a parade float with Raffi https://twitter.com/ChuckWendig/status/1247682332292718596

...at Al Gore's invitation

my favorite might be having a lengthy discussion about grocery store loyalty rewards programs with Jorma Kaukonen of Jefferson Airplane, and then having my childhood best friend run into him at the grocery store

i also once drove a decoy car to protect Harry Styles

my uncle was friends with Arnold Schwarzenegger until, if I remember right, they had a falling out over a member of Ukraine's national women's fencing team? i think? I only met him once when I was like 14 though.

although that time was when i was working security for a bodybuilding convention. lol

i went political canvassing with Clare Danes once