White Bird - S1-E19
Visible crew/equipment: As KITT goes to jump over the fence of the airport, the helmeted stunt driver is seen, as well as part of the ramp pops up into view. Also, you can plainly see that it's the lightweight stunt car, as you can see though it from the bottom.
White Bird - S1-E19
Other mistake: As the guy is shooting at KITT at the retreat, the sparks of the bullets run down the passenger side toward the oak tree with the blue and white umbrella on the patio. Even though Stevie is a blond wearing a blue sweater, the profile and arm appears to be Michael. A moment later, same thing down the driver side, with Michael's arm and profile.
White Bird - S1-E19
Revealing mistake: When Michael crashes through the side of the plane, you can see a pulley attached to the front wheel of the plane, which then is released. (00:40:15 - 00:40:50)
Answer: KITT didn't choose to go off the cliff in Goliath Returns, it just happened as he tried to avoid Goliath. Just 'cus it happened, doesn't mean It's gonna cure his fear of "flying"