Bouncers are meat heads!!!! I have had one reach in my top and grab my chest before...(NOT AT FLB)...I have also had other ones say some really inappropriate things to me and my friends in exchange for entrance...So just because you may be a bit out of touch with what occurs in local clubs and bars doesn't mean things like this do not occur!!!
To put this very mildly: It doesn't sound 100% true that a bouncer just walked away from his job at one location and randomly grabbed and threw someone who was sitting inside a car at another location to the ground while 8 others looked on, did nothing and reported it to no one when it was over.
Regardless, it can't be proven 2 years later by a third party's heresay statements.