50mph downhill is very dangerous... indeed. When I was 12, I rode downhill with a friend riding in the back... really fast. But I doubt it was more than 25-30mph. I hit a dip, somehow managed to do a front-flip, landed on parked car and asphalt. I scraped my knee so deep, it didn't bleed. It was white! Instead of going to doctor, I unrolled the skin back onto my kneecap, went home, wrapped it up, and went to bed, and hope for the best. Almost 30 years later, I still have a nasty scar from it. Since the incident, I developed deep fear of going downhill and losing balance. Ski? nope. Snowboard? ugh. I can ride them, but if I find myself going just a wee bit fast, I brake.
Long winded way of saying... yes, riding bicycle even at 30-40mph is no joke...
Long winded way of saying... yes, riding bicycle even at 30-40mph is no joke...