I don't think anything is confirmed.
Though Knoxville has hinted.
http://www.rottentomatoes.com/m/jackass_number_2/news/1647584/
Originally posted by LoneUnknownfighting0024
I think it was number 2 I watched and it's a mistake to eat while watching this movie. I remember sitting there eating some Pringles and there was a shot of a toilet, I popped a pringle into my mouth and then *SPLODGE* Shit Avalanche. Kinda made my stomach churn, funny movie though.