It worked to give a visible aerosol, I'm just thinking it makes more than you would normally create, which I'm sure was intentional. You have to have more so you can see it if you don't have a Schlieren setup. That's what I want to see, in slow motion and HD so you can see the droplets along with the air currents. Then I'll have to design a negative pressure toilet or I'll never feel like using the bathroom again!

It reminds me of a good lesson I learned with fish. It's a good idea to not learn too much about something you use habitually, it can cause real problems! Sometimes it's better to just not know. ;-)

I think it's a bad example, since if you put dry ice in water it skitters, splashes, and boils, but pee doesn't do that. (At least mine doesn't) But good try finding the Schlieren Optics one.

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You should see Schlieren video of a toilet flushing. You will never flush a toilet with the lid up again.