Devon gets zapped by Bombo's stun-gun, and then Michael, after making sure that Devon is okay, drives away. But the two close-up shots of Michael shifting gears are incorrectly reversed - first the gearshift is shown being put into the "D" position, but the car then backs up; then the shifter is shown being put into the "R" position, yet K.I.T.T goes forward right afterwards.
When KITT drives into the semi, footage is shown of him stopping inside and it's clearly quite dark. A moment later, as Michael exits the car, the entire area is well lit.
When KITT drives through the front gates of the circus on two wheels and eventually slams down on all four wheels again, the dials from a stock standard Trans-Am are glimpsed on the dashboard.
When KITT drives through the front gates of the circus on two wheels, the car clearly has a circular steering wheel, rather than KITT's usual customized wheel.
When KITT drives through the front gates of the circus on two wheels, a metal bar is attached to the driver's side window to prevent the stunt driver from falling off his seat.
When Michael tells KITT to get the clown, the dashboard is visible as KITT approaches and it's clearly the old Season 1 & 2 dash, rather than the current Season 3 one.
When the fire truck pulls up alongside KITT and turns its hose towards KITT, the driver and clown are visible and are clearly stunt doubles - they don't resemble James T. Callahan and Chuck McCann at all.
The orangutan makes the sounds of a chimpanzee.
After KITT and Michael destroy the flame-thrower and KITT drives himself to capture Bombo, a hand can clearly be seen steering KITT. Also, the steering wheel has a traditional round shape, not the futuristic shape usually shown.
After the fire, as Michael approaches the burnt remains, the camera crew are reflected on KITT's side.
When KITT drives into the semi and Michael exits the car, stage lights are reflected on KITT's window and side.
When the circus has a fire, the crew are throwing water onto the canvas walls of the tent, which are not alight.