3 times someone built their own CPU at home
It happens more often than you think.
There's a quote from the second Phineas and Ferb movie where Doctor Doofenshmirtz says "If I had a nickel for every time I was "doomed" by a puppet, I'd have two nickels...which isn't a lot, but it's weird that it happened twice." People use that quote to describe a rare, specific event that happened to occur more than once.
