Yea, it was the first huge heel turn I ever saw also, it was done so well with the phone call skit and then the clothesline in the match vs Studd & Bundy
It lead to an amazing house show run too, specifically because Orndorff was such a great heel and it was believable that he might be able to beat Hogan for the strap
Bobby Heenan & Orndorff were so great together in that whole storyline, Orndorff stealing Hogan's Real American entrance music and then the legendary cage match on Saturday Night's Main Event with the tie finish
I always say Hogan-Andre is the greatest WWF storyline ever because of everything it lead to but Hogan-Orndorff is right there with it as 1 & 1A imo