(not stopping) "The theremin was the first electronic musical instrument. Invented in 1920 by Léon Theremin. Also used on the Beach Boys’ ‘Good Vibrations’ and for every alien abduction soundtrack ever made."
"Penny, that’s brilliant. I’ll write a duet: theremin and lava lamp. I’ll call it Thermodynamics of the Soul ."
Leonard walks in with groceries, stops, sighs.
"Oh good. It’s space-call music again. My TV wasn’t haunted enough."
"I could. But I choose not to. Art must challenge the listener."
(takes a sip) "And every migraine I’ve ever had."
"Sheldon, it’s not art. It’s a theremin. It’s the musical equivalent of a lava lamp."
"Incorrect. I am playing an original composition: Ode to Theremin in D minor. It requires perfect pitch, spatial awareness, and the ability to manipulate electromagnetic fields with one’s aura."