With a sample set of only 4 road crashes (that I remember) I voted for every which way...thought I could have gone with variations on slow & high speed slides...

I'm not sure of the first, it may have been over the bars, or it may have been a high-speed slide. I was 5 or 6 at the time, the hill was steep, there was gravel, I hit the coaster brakes hard before trying to take the corner at the bottom. I got a bunch of stiches in my head and a scolding from a neighbor for damaging the curb with my head. (before the new scolding starts, it was the reckless 60's...I don't think they had bike helmets for kids then)

The second and third were variations of the slide, one from my rack coming un-bolted and getting jammed in my spokes, the second cornering on ice.

The 4th was the obligatory slow speed tip when getting used to clipless pedals.