Other mistake: When the setup for the first match is announced, the Ram is said to fight Tommy Rotten "for the strap", which is pro wrestling slang for a belt, meaning it was a title match. But after the match, which he won legitimately, The Ram is not announced as a new champion, nor is he ever referred to as such, and no belt is given to him after the match.
Other mistake: In the beginning of the movie when Mike Myers starts to play 9 to 5, the title comes on the screen. Beneath it it says: (R) MXVIII Paramount Pictures. It's actually supposed to say MMVIII as the movie was made in the year 2008 and not in year 1018. (00:04:40)