ba-dump-a-dump
When your ass is doing the wave and your brain is screaming for a toilet.
I did the ba-dump-a-dump in the middle of a Zoom call and my boss asked if I was having a seizure.
My friend did the ba-dump-a-dump in the elevator and it smelled like a dumpster fire.
My dog did the ba-dump-a-dump on the sidewalk and got run over by a bus.