My DM last week decided to have this weird fucky thing in the area that we were at. Some fucky wucky magic that was making it so after every roll (except for attacks) the DM made another roll to determine odds or evens. If it was evens, your roll worked as normal. If it was odds, your roll was reversed so that your nat 20 would become a nat 1. But that also meant if you ended up with a nat 1 and he rolled an odd, you'd get a nat 20. This happened twice. We were all laughing nonstop because like... none of us could have metagamed it if we wanted to. And some of us roll physically and others on dnd beyond. DM just trusts us. So when I said a Nat 1 at one point with a pained sigh, I had forgotten about his odds/evens thing. He rolled and started laughing and then we all started laughing as the roll went through stupendously well.

Not exactly the same as what you're describing but I thought it was fun and wanted to share <3