Don't know if this qualify as a bluff...
Years ago when we got discharge from military service, all of us went to a town to have a last night out before going home.
Later in the evening, one of us got into a disagreement with a local tough guy (leather jacket, attitude, two friends backing him up).
Well, we didn't want a fight, so the rest of us separated them and took our guy into a fastfood place, just in time to avoid the cops that came by. Apparently the toughguy didn't have much sense, because as soon as the cops passed, he came after us into the fastfood place, buddies behind him.
I saw them coming, so I put myself in their way before they could reach the counter where the rest of the plutoon was standing. (Now consider the brains of this guy. He has two friends with him, and is trying to pick a fight with what is obviously a group of ten military guys, with maybe 200 more military guys within shouting distance.
)
So I stood infront of them to block their access, totally relaxed, arms acrossed chest, and calmly said "look, we *really* dont want to fight..". He put his hands up, claiming we needed to settle this. I still didn't move an inch, just calmly said "I *really* dont want to fight...".
While I'm saying this, I'm thinking about just how I'm going to hurt him, should he make a move. (I had just completed military service, and even if I wasn't much of a fighter, I was in great shape, had MA experience, and was a lot tougher than I looked. I also had no qualms about going full force from the first punch, breaking bones.) I remember my plans including a cementpillar and some of the tables around us.
Anyway, after a while his buddies start looking a bit unsure. They noticed the rest of my plutoon had turned around to observe, not making a move to help me but going "hey watch this! He's messing with Erik, this is gonna be *fun*..." So his friends just turned and left, and within a few seconds he decided that he should leave too. Never saw him again.
I have no idea how a fight would have turned out, I was mostly bluffing, but I think he might have gotten a real surprise when he threw the first punch