What should you do if you want to go mountain biking but suddenly have to step in as a babysitter? Timo Pritzel shows how it's done and mounts the so-called Mac Ride between the seatpost and steerer tube. This puts the child right in the middle of the action. As BMX and mountain bike legend Pritzel shows in the clip, it seems to be a lot of fun for everyone involved. Rating: Worth seeing and emulating.