I have been knocked to the ground twice, in California State Parks by the beach.
First time trip to emergency, but nothing broken. The guy who hit me while I was running, was in an after-work "peloton" of several riders.
Second time four years ago, hit by unknown source, fractured shoulder, plate and ten screws, three surgeries,, countless painful hours of physical therapy.
The signs say 5 mph speed limit when pedestrians are present but no effort is used to slow down 250 lb. men going 30 mph on electric bikes, or Olympic wanna-bees either.
Irarely wish harm to others, but this was an exception, whereby I fantasized about using a wire stretched across the trail, to take a few of them down. Still think of it once in awhile.