Factual error: When Steve the Pirate is walking down the street in Vegas and gets hit with a drink, behind the truck you see Binions Horseshoe Casino. Binions is on Fremont street, and that is closed to traffic. (01:02:35)
Factual error: During Globo Gym's commercial at the start of the movie, White shows a picture of himself as an obese man in 1987 and indicates that was him 6 years prior. However in the same commercial, you can see a woman grab a bottle of Vitamin Water from a likewise branded fridge. Vitamin Water did not exist in 1993. In fact, its parent company Glaceau was not founded until 1996.
Chosen answer: "Deus Ex Machina" means "God out of the machine." It's from Greek plays, wherein a god would appear at the end of the story to solve a problem. Nowadays it basically means that a totally new plot element appears out of nowhere and solves everything. It's an easy (and cheap) way out.