Ted McGinley and Scott Baio Ted McGinley and Scott Baio

It's a Happy Days reunion on Scott Baio's series See Dad Run! Too bad no one seems particularly happy about it.

In Sunday's new episode (8:30/7:30c on Nick at Nite), Ted McGinley guest-stars as a fictional version of himself — a longtime rival of Baio's character, David. So why exactly is Ted on David's "dead-to-me list" as he so affectionately calls it?

Photo Gallery: Which classic shows should reunite?

It all dates back to an awards show a few years back when the two actors tied for an award and the fight to the podium got a little intense. Here's hoping David got a rabies shot afterwards. Check out the carnage below:

See Dad Run airs Sundays at 8:30/7:30c on Nick at Nite. What other Happy Days cast members do you want to see on Baio's show?