When you stop by the grocery store to pick up a few things after a dinner out, there is no one to watch your groceries for you when you discover, in the middle of Randall's, that you REALLY have to go to the bathroom.
You are left with two options:
1. Leave your groceries, go take care of your business, and start the shopping over.
2. Tell yourself, "I'll be home soon," continue shopping, and hope that the other customers don't notice that the pacing you're doing whilst you ponder yogurt and coffee creamer selections is really a "subtle" rendition of "The Pee Pee Dance."
Guess which one I chose. (Fortunately, all potential crises were averted.)