Originally Posted by -Lukas-
Try to stay off the ground in situations like that, but if you must, focus on chokes. There are a lot of people that can be so drugged they keep fighting with a broken arm. Noone keeps fighting when there's no oxygen going to their brain.
That depends on the area most the person will be working at. The most likely drugs that will be permit the attacker to keep fighting are PCP and possibly Cocaine (since it is a pain-killer, the attacker may not know/feel the broken bone). And depending on where the original poster is from, that may never occur during the poster's work (since it is private security and not a police force).
I posted this in the Stand-Up thread you made too, but I'd say Judo. It will allow you to take somebody attacking you and throw them to the ground and be able to choke them or hold a submission (such as an arm bar) until either the police (or other security) arrives or so you can try to calm down the attacker.