Saw Fatboy at the Gas Tower in '22, which was somehow the first time I ever saw him live. I got a spot right at the front, from where I could annoy him by shouting things I drunkenly thought would encourage him. Why I thought this would in any way help is beyond my sober self. Anyway, about twenty minutes in it became apparent that a tsunami of piss was steadily building and wouldn't wait until the set was over.
I'm always prepared for such moments on the farm, carrying at least one Travel John with me for when there's no other option. The difficulty was that owing to my position in the crowd, I would be on, shall we say, 'full display' if Mr Slim was to glance downward. Also, I'd made a dancing friend at the front and was enjoying their company but didn't feel like I knew them well enough to tell them I had to go to the toilet and then do it right in front of them.
So some secrecy and discretion was required, and I ended up contorting myself into the most absurd position that somehow managed to protect my dignity from both the DJ and the crowd. I remember bouncing in rhythm to the music for a few seconds to create the illusion that this was a legitimate dance move, and then stop so I could pee, and swayed instead which I was able to do without spilling anything.
Finally, I was able to switch back to a normal, upright position and pop the bag back in my bag to chuck it in a bin later (I mention that only because I know some people get a bit funny about that part of using these things).