Bubble up like soap when you run water into them?
I sometimes crack eggs into a coffee cup so I don't get shells in whatever I'm making. When I'm done with the cup, I put it in the sink and run hot water into it so it's easier to wash later. When I do this, the bits of raw egg that are left make the water bubble up like there's dish soap in the cup! Does anyone know what makes them do that? Has anyone else even noticed that they do that?
Weird question, I know. :P