Pit Stop, by David Berger

“Hey, Dolph, gotta make a pitstop.”
“Here? Now?”
“When you gotta go, you gotta go, ’specially at my age.”
“Okay, I’ll look for a spot.”
“Where are we, anyway?”
“Don’t you know?”
“My glasses are fogged.”
“Somewhere over Arizona. Not much down there.”
“Wait. Wait. What’s that over there?”
“Claus, that’s … .”
“Yeah, deep and dark. I’m takin’ ’er down.”
“But there’s nothing down there.”
“Ain’t goin’ all the way down.”
“So what … Claus, don’t do that.”
“Why not? No one’s watchin’.”
“You mean you’re gonna stick your ass out … .”
“And crap in the Grand Canyon!”