During Daryl and the doctor's car chase, they're supposed to be somewhere in Northern Virginia. However, they're clearly in Orlando, Florida. In one shot, a billboard for RonJon's Surf Shop is clearly visible. In another shot, on the freeway, you can read the exit sign for Orange Blossom Trail. This is on the East West Expressway.
The game Daryl plays with Turtle and his sister is "Pole Position". The speed at which he plays the game is not possible to achieve. It is a safe bet that the console it was played on couldn't even handle the game at that speed.
When Daryl and the Doctor are running from the police and switching drivers, when they lose control of the car and spin around, you can see through the rear window that it is obviously an adult driving and a child in the passenger seat, not an adult and a child switching seats.
The Lockheed SR-71 Blackbird needs two Buick V8 "Wildcat" Engines to "bump" start the engines. It cannot be started like an ordinary fighter jet.
Since the Lockheed SR-71 Blackbird has no sealants for the fuel tanks JP7 fuel leaks from the tanks. Thus the plane takes off nearly on empty tanks and needs to refuel five minutes into flight. Otherwise it will run out of fuel.
When Daryl gets cash out of the ATM, the baseball kids in the background get out of the car twice.
When Joyce is explaining to Daryl how to play the piano, Daryl demonstrates his grasp of rhythm of the piece before him by saying, "Whole note, two half notes, and four quarters to a measure," which is a perfect description of a measure in 4/4 time. But the piece they go on to play is in 6/8 time.