No, I'm not talking about the rugged character making puns about zombies as he blasts the head of a ghoul with a shotgun made from scrap metal and vampire teeth. I'm talking about suspensful comedy. Wipe that "Wtf?" look of your face; it could work. Imagine this. You're reading a really, really scary novel. Say... a Stephen King novel. Then suddenly a paladin springs out of nowhere and banishes the evil monster to nowhere. The characters are all relieved and laughing, and as a vent they talk and joke and chuckle and sing. They have a pillow fight, something to indulge in that they couldn't ever since The Darkness arrived. Then suddenly somebody realizes the paladin went missing. Seriously, just imagine it. Your "THANK GOD THAT CRAP WAS OVER", and then the paladin went missing. Wouldn't it be a good way to scare the pants off your reader? Personally, I'd throw the book out the window, switch on all the lights and curl up in the fetal position until my mother comes back home.