Oh boy never test this out. They will attack violently and will not spare you. If they have enough numbers or have the pack leader(usually the one with the biggest balls) close by then they will retaliate. I'm from south India and I have seen a lot of grown up men get roughed up by monkeys
They also move a lot more...three-dimensionally than you might imagine, making it hard to predict where they're going.
Macaques have large teeth and strong jaw muscles (as do dogs); but unlike dogs (or say even piranhas), it doesn't look like monkeys rip and tear flesh like canids. Their mouths are a lot like human mouths: incisors in the front, two canines on either side, and a bunch of (pre)molars, indicative of omnivores. The two canines will definitely pierce the skin. The incisors, most likely as well; but the molars are absolutely useless here.
Whereas dogs (and more specifically sharks) have "saw-like" teeth, that combined with strong neck muscles (and a propensity to grab hold, and shake vigorously, as if they're literally sawing away flesh), make them a lot more lethal to most land mammals.
If we include monkey eating habits, I don't see any large mammals on the list (all the mammals they may eat are smaller than them); compare that to the canid family, that will hunt down mammals many times larger than them. I just don't see how the monkey is built to be able to kill a human being.
Granted, it's going to hurt a lot to get bitten by a monkey. But I just don't see how a 40lb mammal can do that much damage. If you can somehow restrain it by the neck, it's basically over for any mammal of that size without claws (or another means of escape) -- which monkeys don't seem to have.
Now, if we're talking a chimpanzee? I'm going to do everything in my power to get out of that situation. But a monkey? A large dog is more of a threat.
At that point, I believe it's apt to start elbow-dropping, curb-stomping, and punting monkeys.
If for some unknown reason, 5 monkeys ambushed me on a regular walk, I'm confident I could throw enough of a fuss that'd dissuade them from trying to steal my lunch.
Now 10 monkeys? I don't know. That's a lot of monkeys.
I don't think I'm ever going to encounter 10 monkeys, all set on turning me into tartare.
However, if I were to have my jimmies rustled by 10 monkeys at the same time, I would put it at 2:1 odds that I survive without life-threatening injuries.
On the other hand, if you backed five desperate monkeys into corner so that they think they are fighting for their lives, I think you'd fare much worse. I'd bet "punt attempts" sometimes end with the monkey clinging to your leg instead, chomping away at whatever they can reach (and even the molars can do some damage given the tremendous bite force).
I have no doubt it's not wise to fight a monkey, but I wouldn't expect it to actually win.
Are you positive?
A chimpanzee: yes. A guerilla: indubitable. But a monkey?
They seem like medium-sized dogs, that can move around quicker and more freely. They'll bite out your flesh, and perhaps maim you to a semi-serious degree (including infection), but I cannot fathom a monkey seriously killing a grown adult male human being.
These are 20-40lb, very aggressive racoons. If you shock them with anything, they're most likely going to flee for fear of serious injury.