A clip of "cocky" Quinn talking about the timer was made so they could digitally edit him sliding into the hole screaming the answer. His exact wording was "Never try to slide before your preset time runs out..."
The first trip into the first world was set to be as basic as possible, so viewers could catch on very quickly as to what was going on. Plus, the Elvis billboard wasn't the original idea for the world. The original idea was "The Beatles Reunion Tour", but the staff thought Elvis would drive the point home faster.
Quinn's cat Schrodinger is named after Professor Erwin Schrodinger.
The Day Tripper DJ speaking on Quinn's radio is Harry Shearer best known for his voice-over talents on The Simpsons. He also seems to be making fun of the way Rush Limbaugh talks.
When Quinn and Arturo discover the statue of Lenin, Arturo references Lenin as "Nikolay Ilyich Ulyanov-Lenin" - in fact, Lenin's first name was Vladimir, not Nikolay. However, Nikolay was one of Lenin's aliases.
In the opening sequence, Quinn is asleep on his bed with an open book on his chest. The book is Hyperspace by Michio Kaku. The book is explained on the cover as being "A Scientific Odyssey Through Parallel Universes, Time Warps and the Tenth Dimension".
When Quinn looks at the timer on the ice Earth, it's counting down, but on his first slide, it's counting up.
When Rembrandt is walking down his steps to his car while singing the national anthem, the words don't match what his lips are saying.
When Rembrandt's caddie is first seen driving away, its "Cryn Man" license plate has no registration tags. In later shots of the rear of the caddie, the car has tags.
Despite landing on a frozen over world, neither Arturo, Wade, Quinn or Rembrandt's breath fogs.
In the opening, Quinn runs from Golden Gate park to the college, which seems to be next to each other. In real life, they are very far apart.