You seem to have some style in you, keep playing. Few months and we could see some nice stuff from you.
Nothing wrong with having fun with mods, but don't bother making replays with them. It's ok to manipulate gravity to fit your purposes though, -9.82 (classic mode) and -30.00 (sambo) are the normal ones used.
wheresthehead.rpl looks like the head has a negative gravity and the rest of the body has normal gravity and when you decap yourself it flies off. Consider it a helium balloon for head. It's not a glitch, you are just using mods again.