I've heard he drove all the snakes out of Ireland. And is the first to use a three leaf clover to help explain how the Father, and the Son and the Holy Spirit are three but one. Or something like that.
@Zaphod42 nah he had a beef with corn... Bad gobbers. I had buck teeth. Could eat corn on the cob through a picket fence. Kept me chin dry when it rained too.
