wesleyhazel24
Apr 4, 2007, 01:01 PM
Have you tried dunknow jumping program if so how many inches did you gain
pennstate98
May 10, 2007, 02:44 PM
I haven't tried it but the website says 8-14 inches if you do it correctly.
If I were u I wouldn't trust that number though. They're just trying to get u to buy from them.