maybe your comprehension would be better
Well, I read the thread, and this is my conclusion about tacking. I've probably prevented three armed robberies about to take place in a Kentucky Fried Chicken, a gun store and a stop-n-rob convenience store. Also an assault from the rear in a WalMart restroom. I say probably because all four potential incidents never actually went down, so I have to qualify my statement.
In all cases, the mere perception I had a gun or was otherwise about to interfere (telephone) was sufficient to back the suspects down.
A tackle in any of the above would have proven disastrous, as all three of the possible robbery attempts involved multiple perps. But stay on your feet, and for them it comes down to who wants to get shot first or still be around when the cops roll up.