What kind of witch's potion are you brewing in there?!
Using Lasers To Visualize Invisible Toilet Plumes After Flushing

Seen here looking like the radioactive waste produced by my roommate, this is a short video utilizing a green laser to visualize the atomized plume caused by a toilet being flushed. I don’t want that sparkle bomb touching my butt! So, what’s the lesson here — stand up and close the lid before flushing? Should I shuffle out of the bathroom with my pants around my ankles like a penguin? Remember the kid who always used to drop his pants and underwear to the floor just to pee at a urinal? Well I’m that kid, all grown up. Now I just leave my pants and underwear by the door.

Thanks to my dad, who agrees more bathrooms should have cool laser effects.