I use 4 of them (each geared differently) for Singletrack/Offroad Mtn Trail/Gnarly stuff only and 1 as my dedicated foul weather bike and the other half dozen for goofy stuff like this:
http://www.youtube.com/watch?v=uZtlvoQyxeI
http://www.youtube.com/watch?v=dQwbugzbKSE
Most of my Tange and Ishiwata GT's are on the MTB thread, M400, M600, several Cannondales, Handmade Stumpjumper M4 is my most serious machine dedicated for offroad, Schwinn's, Panasonics... I am rarely able to ride rigid/rigid anymore and tend to offroad with Hardtail FS rigs....
http://www.bikeforums.net/showthread...+panasonic+mtb
I've been wanting to film my fun times in the mud on Lookout Mtn, CO but I don't have a camera for my helmet...