There are a lot of former teenage BMXers on this forum, same for skaters (see the Jason Lee thread). I used to ride BMX a lot, but needing to get from place to place faster than you can on a BMX got me onto geared beaters and then FG. Now that I'm getting my balance back in tune from trackstands and stuff I'm starting to pick up the bmx again to try old flatland tricks I could never do.