I just bought a Gary Fisher Tassajara yesterday, and was browsing the maunal that came with the bike, and it stated it's not designed for jumping. It states "momentary loss of tire contact with ground" is the design capabilty. Now, I know the bike isn't made to go off extreme jumps, but am I not to jump it at all? I'm thinking I'd be ok with 3-4 feet or something like that. I'm new at this so I'm just trying to find out what limits I shouldn't be exceeding. Thanks for any feedback on this. I'd hate to think I can't jump my $600 bike I just bought.