Sadly, they travel in packs, normally if you knock out the one giving you the trouble you're jumped on by half a dozen of his mates. They will often try to goad you into something so they can purposely gang up on you to beat the crap out of you. Long time ago I was being given a load of crap by a group of 5 lads, the ring leader being the vocal one and the rest just laughing. I suggested he should come say it to my face without his girls to back him up. It ended up with me running for my life being persued by half a dozen lads with lock knives.