Bio-harmonic Universal Multi-Modular Emotional Rerouter

"He says you're absolutely right. We use the Bio-harmonic Universal Multi-Modular Emotional Rerouter, it's in his trunk."

"Th...the "BUMMER"?"
 * Lewis and Wendy

The Bio-harmonic Universal Multi-Modular Emotional Rerouter or BUMMER is a device used by the Middleman to reverse the emotions of all inside its blast radius. It was used by Wendy Watson in "The Ectoplasmic Panhellenic Investigation" to turn a raging party mob into a depressed, lifeless assembly; whether it would work in reverse (livening up a dull crowd) is unknown.