I had about a 40mph get low side...wearing a Bieffe helmet, Joe Rocket textile jacket (cant remember the name), AGV leather gloves, Levis, and shoes...
I slid about 40-50 feet before hitting a parked car (lucky for me, or Id have been fine)
I broke my left scapula (shoulder blade), and transverse process on my spine, and pulled a bunch of muscles.
No rash, no marks of any kind. My helmet had a few srcapes where it went under the bumber of the car, if not for it, Id have had a pretty bad headache, and maybe a missing ear. Cheap helmets do work better than nothing, and better than most expect. My gloves had some scrapes on the palms, but no splits, overall an excellent glove, and it was one of the cheaper ones, but did have kevlar stiches on the palm area. My jeans actually had no marks other than dirt, but after a few washings, and a few months down the road, there were some holes develop from what I beleive to be the areas scuffed in the slide. Again, worked better than Id have expected.
Side note here, I had a BEnchmade AFCK clipped in my right pocket, the side I slid on, and it has a momento of the occasion, a part of the handle was beveled, and the clip scratched. My jacket was the worst, the JR patch on the right shoulder (which I still have) was melted, the jacket itself had a few holes through the first layer, but no damage to the foam underneath, the left side outer shoulder was ripped almost off when I went under the car. Otherwise the jacket was fine.
I had the jacket sewn back together and used it for about a year after. I still use the AGV gloves. Got a new helmet shortly after, and I also wear boots now. I still have the jacket, and it would survive another crash just as well, but I switched to a JR Alter Ego for more all weather comfort.
Oh, I guess I should mention, thanks to the a-hole rider (yes another biker caused this) for pulling out in front of me, and then taking off...