Factual error: When Mark and Reggie are fighting over whether or not to go to New Orleans, Mark starts walking toward the Memphis-Arkansas Bridge. There would be no need to cross that bridge as New Orleans is due south on Interstate 55. The Memphis-Arkansas Bridge is Interstate 40 and goes to Little Rock, AR or north to St. Louis.
Factual error: When Mark pranks the detective by using his credit card to order 20 pizzas, he only reads out the card number on the phone. To order via credit card, you must say the expiry date as well.