Swamped

So you'll start by dragging out this bluff for every second you can, in hopes that an idea strikes you. Or perhaps Black will think of something he can do. The important thing is to act confident, so you raise your arm and point directly at your heckler.

"Well, if you insist," you reply calmly. "In fact, if you're going to be this much trouble, I may as well just freeze the lot of you and save myself some time."

That's one thing about facing six instead of two. The more of them there are, the more likely one of them buys it enough to panic, which is exactly what happens. One of the most nervous ones rushes away to the front of the store, knocking down another on her way out. Two of the others rush to the downed one and try to help him up.

The man talking to you hasn't backed down an inch, but now there's only two with a shot at reacting fast to anything you do, and one of them looks like his first inclination will be to get out of there. You take a step forward to heighten the effect, and he panics. He rushes to the same door the other one went through, but shoves the other three aside and knocks one of them into a pile of fish.

"He's bluffin', you damned fools!" the last one shouts, turning towards the front door. Which means he's not looking right at you. Now's the time to make a move.