In Versus Mode, as a Smoker, pull a Survivor into a Witch and let him startle the Witch.

Another thing you can do is go behind car with an alarm.

Pull a Survivor against the opposite side. Now, the Survivors must risk shooting the car to save their friend.

For added pleasure, have your friends swarm them so they have no time to go around the care and kill you.

Lastly, in Dead Air, Level 4, there are metal detectors in the airport. Pull a survivor through the metal detector, which goes off.