"Not in the face! Not in the face!"
"I'm okay!"
WHOMP!
(feebly) "I'm still okay!"
"I can't believe that after 25 winters, I'm finally retiring from the Watch tomorrow...me and the little lady have bought a boat, and come tomorrow, we sail off into the sunset sipping Mai Tai's. Here, take a look at this woodcut, ain't she a beaut'?....Arrrgh......"
You may have already thought of this but encourage the players to be silly: punting humans like footballs, using them as weapons, using them as puppets after they're dead.
Dialogue:Actually, an invisible ogre mage trying to gain entrance to a fortress by walking an unconscious river warden up to the front gate like a puppet is a pretty good tactic! The dialogue at the gate would be hilarious.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.