I don't have a dog in this fight, but I wonder what the velocity of one's head hitting the pavement is if you just stand still and fall over.
That's 0MPH, but it still seems like it'd be enough to do damage.
So yeah, that can be enough (might have been a heart attack as a result of the shock, I am NOT a doctor, but he was gone by the time the ambulance arrived).
Also, one of the reasons street fighting is so dangerous has nothing to do with MMA dudes, it's when someone falls down and hits their head. This happens all the time. They sometimes die from the fall.
it's all context, no?
You wouldn't try to trick over a 17ft drop on a longboard, either. [0]
[0]: https://www.vice.com/en/article/kzn58e/the-leap-of-faith-was...
Bombing a hill is very different from skating a stair set. The speed at which you do tricks is manageable to be able to tumble your body correctly if you fall (and you’re ready for that fall usually) but bombing a hill is an enormous amount of speed and you can’t prepare yourself for an unknown rock that throws you off.
That’s another somewhat important difference too with street skating, for big tricks you triple check the area and often sweep it because of those tiny rocks.
So context does matter. I’m not advocating against helmets but these are incredibly different things.
Edit: and fwiw I’ve hurt myself far more bombing hills than I have skating something like the big four in ATL. Notice how they fall: https://youtu.be/Ban0D24Aip4
(And the reason they aren’t making this trick is ironically they are not going quite fast enough)
Edit 2: and because I’m reminiscing a bit, the big four is hard because the run up is pretty short. You need good bearings and small wheels to gather the speed required. The only time I’ve ever seriously hurt myself in 15+ years of skating was doing a dumb trick in a standing position. Helmets are important for things like vert for sure where it’s lots of speed and lots of height, and if my kids and I go out and skate we wear helmets (they’re small and I want to set a good example). But most of street skating can be treated as though you’re a trained stuntman (because you basically are)
The 17ft drop is equivalent to the 80mph example in my post, and should definitely involve a helmet, gloves and impact padding (which can be worn under clothes).
That alone makes safety gear much more essential for downhill.
In addition, if someone shows up to a spot without adequate gear, crashes and badly hurts themselves, it can cause the spot to be blown for other riders. Downhill skateboarding is much easier when you’re on the good side of local residents and police.
Also, since DH communities tend to be very small and tight-knit, if someone gets hurt you hear about it. I’ve personally witnessed multiple incidents leading to broken spines, countless minor injuries, and have had one friend die while skating. Either you take safety seriously or pay the piper.
There are more factors than this, would probably make for an interesting sociology dissertation.