Mostly he wasn't going to fill up the potty tank, lift it up and shake it like he normally does :)
It gets it really clean that way, but again, having an audience seeing him shaking a potty tank like a bartender does a margarita was not his idea of a good time.
I am sure people laugh at seeing us dump, rinse, shake our little 5 gallon tank (then give it a quick exterior clean up with a Clorox wipe), but we like it b/c it stays almost perfectly clean, and is easy to dump at home.
But that d#mn bear costume was a riot. And he arrived in a golf cart! Just too funny.