We had a laugh with this couple, and brought along a couple of CO2 fire extinguishers. I set the shot up, but didn't tell the couple what was happening. The bride's reaction was priceless.

Main challenge.. in the pitch dark, getting the guys to coordinate the fire extinguishers (how hard can it be). Next challenge, predicting the lighting for an unknown (each extinguisher has 10 seconds of fun)

Lit with 2 speedlights. One low and behind, and the other high

How heavy are fire extinguishers!