When I was a waiter I didn't practice opening a bottle of champagne tableside before doing it for the first time, which happened to be a romantic dinner for a beautiful young (newlywed?) couple.
I had the napkin too tight over the cork and when I popped the cork, the champagne squirted through the napkin in a long stream in the face of the lady. I remember seeing it in slo-mo and tried to correct the angle by moving the napkin. Worse result: I squirted (champagne) all over her boobs and front of her dinner dress. Positive: in the candlelight she looked radiant and glistening with all the beads of champagne on her skin like that. Negative: I think the guy saw me noticing how radiant. Positive: They were super understanding and still gave me a great tip. And I bet they get as much mileage from the story as I do.