the poster of this video, russell jacobs claims these two trying to steal that bike. using angle grinder to try to saw off the u of lock. >> i don't need your permission to film. >> you. >> 'do. >> [ bleep ]. >> any possibility that these guys do own the bike and lost the key to the u-lock. >> the guy with angle grinder says that. >> guys with angle grinder going on a bike here. >> i lost my -- >> once they get the lock sawed off, russell jacobs claims the guy on the right takes off. asing this guy down while the cops. he doesn't cycle all the way away because the front fender is clipped. the bike is inoperable at this point. san francisco p.d. able to catch up with mr. man in the blue shirt. according to the poster of the video, he wasn't able to prove he stole the bike. at this point, no one knows the actual owner of this bike. but this guy apparently had existing warrants out for his arrest. so this officer was able to put him in cuffs and take him in. another video of a guy trying to stop evil in its tracks. this fellow a 59-year-old, that's his suv he has just pa