The PO of my Stealth hit a deer and caused a decent amount of damage to the car. It was turned into insurance, and repaired. I know this because the PO told me before I bought it. That incident doesn't show up on a Carfax report.
A few months after I bought the car I hit a deer and caused $2500+ in damage. The incident was reported to insurance, but I repaired it myself. That does not appear on a Carfax report.
A week or so later I was run off the road and slid into some guard rails. Again, it was reported to insurance, and again I repaired it myself, and again, it doesn't appear on a Carfax report for my car.
About 5 years ago (shortly before I bought the GP), a well worker had a piece of equipment fall off his truck and lay in the road. I was unable to stop and "ran it over." It jammed under the car, busted the bumper cover, busted a hole in the oil filter, and dented the pan. The car was towed to one of my "approved" insurance repair places, where they got it to where I could drive it again. I had a fight with the insurance company over some of the repairs they wanted to refuse, so I picked the car up, fought it out with insurance, and got my check to repair it myself. Yet another incident that does not appear on a Carfax report for the car.
I repeat, Carfax is a joke.