Punch knock
Punching a door several times instead of knocking normally.
The man in the pink shirt punch knocked on the door with his massive fists.
donkey punch knock out
When you are fucking a chick doggystyle, donkey punch yourself, knocking yourself out. Going for the double knockout, fall face first into the back of the chicks head knocking her out, while still inside her you both fall to the floor.
"Louis and Tara both have concussions from that donkey punch knock out they performed lastnight."