Bike sense

I'm all for biking as a mode of transportation - when I lived in Vancouver, I rode to and from work and school every day for a year. However, sometimes it's a bad idea. Like when you're a 50 year old man and choose to ride with no hands (cigarette in one hand, other hand on hip), in the rain, beside a busy highway, with no helmet.

Another bad idea: letting your handle bars wear your helmet for you, "You have scalp lacerations and a concussion and I can't let you fall asleep cause you might not wake up. But don't worry, your handle bars are O.K."

Good idea: common sense. Unfortunately, as the saying says, common sense isn't all that common.