This didn't really do much.
We don't know the finer details of this story, but we can assume that the fire extinguisher-wielding barmaid had reached the end of her tether with these vocal Stoke City fans.
In an attempt to silence them, she empties the contents of the extinguisher all over them.
Unfortunately from her point of view, it does very little to deter the singing.
https://twitter.com/FootyAccums/status/650973987154067456?ref_src=twsrc%5Etfw
https://www.youtube.com/watch?t=37&v=BvEHUVswSXI
