The timer-clock for the mechanical bucking bull shows less than seven seconds, yet the sheriff stayed on the bull for nineteen seconds.
In the opening scene, Michael is wearing a blue T-shirt with a red collar which changes to a black shirt in the next shot. When he pulls a piece of paper out of K.I.T.T's printer, a red sleeve is visible. But in the subsequent shot he is again wearing the black shirt.
When Michael unfolds the Unified Ranch certificate from the safe, his shirt sleeves are all the way up to his wrists. On the close up of the certificate, the lower part of his arm, above the wrist, is bare with no sleeve visible. In the next scene, when he puts the certificate down, his sleeve is down to his wrist again.
When Michael finds the safe, before he crouches down the handle is in the "down" position. When he crouches down and the shot changes to the closeup of the handle and dial, the handle is in the "horizontal" position.
When KITT takes Diablo for a ride, KITT is covered in dust. In the following scene when Michael tells KITT to meet him at the barn, KITT is totally clean.
The rustling scene near the end was clearly shot at the same time as the rustling scene near the beginning, with some small overlap in reused footage.
When Michael proceeds to open the sunroof to board the van, he pushes the EJECT LEFT button rather than the AUTO ROOF LEFT button. This action should've resulted in him being ejected from the vehicle.
When Michael and the Sherriff take turns riding the Buffalo, the footage is clearly accelerated.
When KITT shows the footage of Rebecca in the lake, allegedly drowning, the water is barely knee height and it's obvious she's just splashing around.
When Michael and the ostensibly virtually indestructible K.I.T.T. rush to rescue Dr Hammond from the water, K.I.T.T. nosedives into the dirt just before coming to a stop. A crack can be seen in K.I.T.T.'s front trim following the nosedive.
When K.I.T.T. microlocks the minibus's wheel system the vector line drawing of the vehicle shows a coupe car (such as K.I.T.T.) and not a minibus van.