Rather than reaching for the knife when it is drawn as many people tend to do, this security guard punches the man, and as they go to the ground he and controls the hand holding the knife. He extends the hand away from the body which prevents the man from reaching for it with the other hand. Bystanders step in and assist. Excellent instincts.
Belligerent man attempts to intimidate couple, pushing a female in the process. He seems to regret this a split second later as he reaches to hold and prevent her from falling.
Unfortunately he has already failed miserably to take stock of the situation he is in – alone, drunk, surrounded by bystanders who may not tolerate his behaviour.
Two men argue with two security guards. Another guard grabs one of the men around the neck from behind. As the other man looks back and is distracted, a security guard standing in front of him punches.
The guards flanked and overwhelmed the two men. Human only have eyes in one side of their head, and a split second of distraction is all that is needed to land a punch undefended.
Excessive force on behalf of the bouncers, and idiocy on behalf of the drunks who initiated with aggressive posturing and continued to approach after it was obvious they were outmatched.
The first bouncer kicks his downed opponent in the groin after he falls. The second slaps him down again when he gets up and refuses to leave. A friend attempts to intervene and is punched.
No sucker punch here – a drunk challenges the bouncer to a fight, gives him plenty of notice and telegraphs a haymaker which fails terribly.
Security guards take down a man who has invaded the field at a soccer match. The guards hit him with their batons while restrained, and the crowd intervenes and attacks them in return.
The chief mistake by the guards was failing to appreciate how their actions may appear to bystanders.