The ringtone for Clint's S.H.I.E.L.D. phone wakes Clint up instantly, though the fact he's only slept 2 hours in the past 48 doesn't make it an exactly happy awakening.

"If this isn't an emergency, I will honestly kill you," he answers, not checking the number -- because Coulson can handle a few death-threats and the junior agents who sometimes call him for advice probably need more of them in their lives.