A combination of the Houdini and the Donkey Punch. This is the act in which, during doggystle sexual intercourse, the penetrating man spits (or pours warm yogurt) on his partner's back, causing the partner to believe the man has "finished." Upon the partner's turn of the head, the man forcibly socks his partner upside the head and then proceeds to manually release his cumload in his partner's face.
(gay version) Matt's eye was swollen for a week after Len houdini punched his ass.
(non-gay version) I houdini punched that bitch for no good reason at all.