The comment was a sarcastic, exaggerated (but not by much) version of what Trooper Paul said last week. He said John was hit in the right arm by the taillight, causing it to break, and that caused him to spin around as he flew through the air and landed on his back on the ground, causing the head injury.
Then today when Jackson was questioning him, asking how the broken glass got where he was and not knocked out of his hand when he was hit by a car going 24 mph in reverse, Paul said “I don’t know, I wasn’t there.”
Yep. This is real life and these things were said under oath.