I was riding the local mup with my wife, it was a nice day so the families where out in full force. I usually say something to the kids like doing good, way to go, etc. Approaching is a little guy on a little bike with training wheels, with legs going what look like 100 rpm, and the most intense look of concentration on his face. When I got close enough, I held out my hand and said something like "Keep it up little buddy!" As we pass, the little guy doesn't break pace or concentration, and sticks out his little paw. We slap hands as we pass. All the while his mother is behind him on her bike, with another kid in a seat, going "no,no,oh no, no,no". The kid held his line like he did it every day, not even a hint of a wobble. I was laughing so hard I almost fell off my bike.