Hey dude, search around on this forum and you will see that the DBZ stuff IS NOT REAL!
Most of what you see in movies and on tv - no matter how much you'd like to believe it - IS NOT REAL!
Even in most popular martial arts movies - IT IS NOT REAL!
Please read through a few of the posts that are on this forum, this topic has been beat to death and then some.
BTW - welcome to the forum.