Dr. Lamb says, "General, a machine becomes human when you can't tell the difference anymore." This summarizes the famous Turing Test, devised by Alan Turing, a founder of modern computer theory.
Daryl and the doctor switch drivers while running from the police. When the car spins around, through the rear window an adult is driving and a child is in the passenger seat (at around 1h 12 mins).
At the beginning of the film, the 4-door, blue Chevy Nova Dr. Mulligan is driving (00:44 to 01:07) turns into a 2-door, gray Oldsmobile Cutlass (01:23 to 01:31), and back into a Nova (01:31 to 02:33).
When Daryl ejects from the SR-71, he floats down to the water while attached to his seat. Ejection seats automatically separate. The parachute is not designed to support the combined weight of the pilot and the seat during the descent, and landing with the seat could fatally injure the pilot.