and how the hell do ya do do that stuff? l see guys doing wheelies while riding on the handlebars!l ride choppers so the most l can do is a wheelie or a power slide into my parking spot. Those stoppies you guys do lokk reaqlly cool but how do ya do that?
and l allready know l cant do that with a chopper

l takes a lot of practice and a having a bike you do not really care to much about damaging.

There is nothing wrong with stunting when it is done in a controlled enviro. Stunting on public road and showing off is just plain stupid.

Practice, practice, practice, practice and more practice.

Get a decent used 600, add some crash bars and a 12:00 bar.
find a nice empty parking lot, and just start trying stuff, you will gradually get better, and define your own style.

stoppies are not terribly difficult, most any bike should be able to do it if it has decent brakes and decent tires.

As mentioned lots of practice, but what was not mentioned was the willingness to get a lot of road rash in between the learning curve.