I work as plainclothes security in various stores part-time whenever I'm not doing security systems, basically a secret shopper in grocery stores. I throw some stuff in a cart or basket, walk around, and catch shoplifters. Most of the time it's people who do it just because they don't want to pay but occasionally you'll get the professionals who load up on things they can sell out on the streets and they're often not too keen on going along with you without making a scene. I carry a training kusari fundo with me (basically a 3ft length of thick rope with two braided ends) and I've used it numerous times to entangle and restrain someone who was trying to emulate Mike Tyson and throw some blows.
The most memorable one I have was of a heroin addict who was attempting to run from the store and who literally clawed and chewed one of the stockboys who tried to stop him. I ended up chasing him out towards his car where he was desperately trying to unlock it to make his escape. I struck his wrist with an ura shuto (basically a knife-hand strike) right on the nerves, then kicked his keys under his car. We started tussling by his car and eventually I managed to get him with a musha-dori ("warrior take," an arm entanglement that wrenches the shoulder and elbow). He bit me during the confrontation though, so I had to get an AIDs test and sweat it for two whole weeks till the results finally came back negative. The hearing's in two months so I'll keep you posted on how that all goes
