I was going over a bump. When the front wheel hit the bump, it suddenly stopped moving, the rear wheel lifted off the ground, and I was thrown face-first onto the road. I sustained injuries to the face, hands, chest and knees, and had to go to emergency (see edit 2 for photograph of injuries).
I'm fine now, but I wanted to understand this so that I can be safe next time.
This happened with two different cycles, so I know it's not a defect specific to a unit or to a model. One was an e-bike, with small wheels (maybe a foot in diameter), poor or no suspension, and was going at its maximum speed of 25kph.
Since I was asked, here's a photo of my riding posture:
And the brake lever:
The other cycle has the usual-sized wheels, no suspension, and was going at 25kph or slightly slower.
In both cases:
- I was going more or less straight.
- The road was dry.
- I never pressed either brake.
- The bump was tiny, half a cm at most, and the bike can navigate much bigger bumps at full speed safely.
- The road was otherwise smooth.
- It was the front wheel that caught the bump.
- I was thrown over the handlebars.
- There was no indication of anything going wrong before I was thrown over the handlebars — no skidding, no scraping sound, no loss of balance, nothing.
- The vehicle didn't have apparent damage either before or after the incident.
- I wasn't carrying any loads.
- I didn't have loose clothing that can get stuck somewhere.
- I wasn't applying the brakes.
Is it because the bump caused the front brake to apply spontaneously? Is there anything I can do to be safe, because at this point, I'm a little concerned about using bicycles or e-bikes any more.