“Stop," Kincaid said in a calm voice. "Unclench."
"Unclench what?" Murphy demanded.
"Unclench your ass."
"
Excuse me?"
"You're going to trip the beam. You need another quarter inch. Relax."
"I am relaxed," Murphy growled.
"Oh," Kincaid said. "Damn, great ass then.”
―
Jim Butcher,
Blood Rites