I Laughed. Out Loud.

You know those messages people make with plastic cups on the freeway overpasses? They usually spell out "Welcome Home, Elder," or "Will you marry me?" or things like that. Today I saw this profound thought spelled out neatly with the cups:

POOP!

I laughed out loud. Without the exclamation point it's just stupid kids messing around. With the exclamation point it's genius. Your thoughts?