It's the Matt Hardy/Sammy Guevara feud. While I remember the chairshot heard around the world, I had forgotten how botch filled all of their matches really were.
https://www.wrestlecrap.com/inductions/matt-hardy-vs-sammy-guevara/
Yeah I legit thought one of them was gonna end up permanently injured or worse at points. You'd think they would have stopped pushing their luck after the first match, but NOPE.