No Big Thing - S1-E8
Visible crew/equipment: After the sheriff radios to the trucker to stop Michael Knight, you can see KITT drive by another KITT parked on the side of the road in the overhead shot. (00:23:40)
No Big Thing - S1-E8
Visible crew/equipment: At the end, as KITT goes to jump the camper, there is a set of what appears to be mirrors to hide the obvious ramp.

No Big Thing - S1-E8
Visible crew/equipment: As the truck Devon is driving jumps the chain link fence, the helmeted and harnessed stunt driver is easily seen.
No Big Thing - S1-E8
Visible crew/equipment: When the camera looks at KARR's modulator, it appears to be nowhere in the futuristic dashboard.
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"