It's called mountain biking; the bike you have is designed for tame trails, basically the "XC" -- cross country -- portion of it. Extreme...no. Check out something like 'New World Disorder' to see some extreme stuff. Those guys have rugged, heavy-duty bikes that can be jumped off garages and small cliffs. Don't jump your Cyclops off anything bigger than a high curb.

Actually, you bought too small a bike, too; that bike is meant for someone 4'8"-5'1", approximately. The 66cm (26") wheel will roll over small bumps easier than the 60cm (24"). (It's like the argument about the 29ers going on, they are supposed to just "FLATTEN OUT" a trail....)

Start saving your money; go to a real bike shop and get an idea of something you'd REALLY like to have, try a few out if you can. Go easy on the Target bike until you have the $$ saved up for what you want. BELIEVE ME -- a quality bike will dial up the experience you've already tasted. (Some people here will try and tell you that what I just said is snobbery, that major-retail stores like Target sell bikes that are just as good; partner, I've built these things for over a decade, I do this instead of shop work because it pays better and I have a mortgage, and there's a REASON I spend $2K on a bike for myself, and it's not snobbery. Just sayin'.)