Responsibility

In a Kingman, Az hotel room

"There's no toilet paper."
"What?"
"There's no toilet paper in here."
"Oh, yeah.  Um, C very methodically tore off each square and put it in the toilet."
"The entire roll?"
"Yesss."
"When?"
"You know that ten minutes you went off searching for coffee and you asked me to keep an eye on him?"