As the title says I did exactly this. My stomach was having a particularly raunchy morning after consuming both dairy and gluten in the same meal and my body had made the decision to cancel all plans for the next hour as I’d be glued to the toilet for fear of shitting my brains out. As I finished up feeling much better off than I was when I sat down, I decided it was time to wash up and set the bidet to low but as I did this the pressure started dropping and I can’t get a good clean in with no pressure. So, I gradually turned it up till it began to return to normal, which just so happened to be at max. Sat there for maybe 2 or 3 seconds and almost as soon as I’d turned it to max, the pressure returned screaming for vengeance and plowed a hole through my anus and power washed my colon leaving me too stunned to scream and scrambled to shut the damn thing off. All the while I was barely able to keep my ass down so the water wouldn’t spray all over the bathroom. I sat there for maybe 30 seconds collecting myself when I felt a deep sloshing and rushing feeling like a trapped fart finally making its escape. I prepared for this thing to rip me half as it exited but I was so very unprepared. This supposed fart ended up being a stream of water that turned on my butthole on like a bath faucet and proceeded to shit straight water for about 40 seconds while I could only sit there helpless and wait for the endless stream of water rushing out of crev to stop. Once I was all finished up I skipped the toilet paper and went right to a bathroom towel as everything in the bowl at this point was dripping wet from the raw power of uncontrolled water pressure. Anyways two hours later now and I still am not able to trust farts and my turds are about as solid as trumps case for reelection.

TL;DR Cranked the bidet up to 11 when the pressure started dropping and gave myself a enema when it returned

EDIT: Can’t thank everyone for all the awards, so this is my thanks