During the car chase, K.I.T.T. says there is a semi truck obstructing the road ahead and that the assassin will collide with it. Although a semi does enter the road, the actual obstruction is a pickup truck.
Dr. Sarah Graiman injects Mr. Knight with a needle. However, she uses the needle on his hand all the way to the hilt, and the needle is long enough that it should penetrate all the way to the palm.