The bust went down Tuesday in Madison, Wisconsin where a swarm of officers descended upon the guy who'd been using his megaphone to, as they put it, disrupt the peace. He also had a baseball bat on his shoulders as he yelled at customers and restaurant staffers from point-blank range.

It took as many as 5 officers to detain 28-year-old Devonere Johnson ... who was resisting arrest. It took several cops tugging at Johnson during the struggle before they ended up with 4 officers on his back and legs. Important to note, none of them were on Johnson's neck ... though he did complain he couldn't breathe before they hoisted him off the ground.

Vigilant bystanders -- including the outspoken man recording the scene -- demanded officers release him, as they claimed he'd done nothing wrong besides using his voice to exercise his First Amendment rights.

The cops weren't having it though, and eventually carried Johnson by his legs and torso and tossed him like a sack of potatoes into a patrol unit. Somehow, Johnson, who was now handcuffed, managed to escape out of the cop car ... before they pounced on him again.

Again, the bystander with the camera didn't give up, and continued pleading with several officers to let Johnson go free. They didn't and he was officially busted for disorderly conduct while armed, resisting arrest and attempted escape.

The cops add that 2 officers suffered minor injuries during the arrest, and Johnson had bruises on his arms and legs.

The question ... was there a more peaceful way to handle the situation? He had not physically harmed anyone and, according to police, was walking away from the restaurant when they arrived. Yes, customers did seem to feel threatened, so if ya gotta arrest him was this a prime case for de-escalating before manhandling? In fairness to cops, it's possible they did attempt to do that before the video started.

BTW, the scene was still bizarre even AFTER the arrest ... watch what happened when someone tried to get all Biblical.