Had that happen to me once. I was flying on a downhill path and there were a million acorns scattered right in my way. I had to think quick ... so, with my front brake, I braked harder than I have ever done before. Short story: my front wheel practically locked, back wheel came up, sending me over my handlebars, and landing a nice frontal face skid on the pavement. Good thing there was a bathroom about 15 ft from where I landed. And inside, behold, a mirror (to look at my face in)!
Yes, back brakes are nice
