My Trek Checkpoint bike is still like new.

Today I flipped over the handlebars. First time ever, I believe.

I was wearing my helmet. But — happily — the Gymnastics training kicked in and I pulled off a shoulder safety roll with perfect technique. No damage. Helmet never hit the dirt.

What happened?

I was on level ground. Easy riding. INSTANT stop.

My fender somehow came loose and wedged behind the tire.

Weird. I’d never heard of this happening before.

It’s still on warranty so I’ll have the dealer fix it.