Help me find preschool bike stunt movie

A year or two ago a movie did the rounds of the blogs. As far as I remember, Mom said goodbye to preschooler, 'have a good day at daycare', and then the preschooler went off on his own on his running bike, through the woods doing all kinds of stunts. I could have sworn it was on kottke.org but I can't find it there or anywhere else. What was it?
posted by beniamino on Sep 18, 2011 - 6 answers