"Just guide it down the neck with a bit of oomph," she instructs me, confident.
I grip the butt of the bottle in my left palm, finding the groove of the glass seam with my thumb. My right hand holds the sword firm around the handle, the heavy blade balancing on the cool glass right where the bottle begins to taper into the neck. She shows me the motion again, assuring me that there will be plenty of pressure, that it will pop right off.
Tentative, I slide the blade quickly down the bottle, flat against the glass. Nothing.
"More oomph!" She smiles, setting the blade back in place.
I bite my lip, adjusting my grip within the hilt and swing, round two. The top sails off as easily as if I had been beheading a banana. A flood of champagne, and everybody cheers. Squealing, I relinquish the dripping bottle, shake the champagne from my hand and pose for a victory photo, avec blade.
And that's how you saber a bottle of champagne.