How did it happen? Plugging the extension cord into itself created UNLIMITED ENERGY on an infinite loop. The cord sleeving couldn't contain the raw power. #trollscience
For added effect, re-read while playing the Jaws soundtrack until the 9th panel. Then, after the 9th panel, play the soundtrack in reverse. Maybe a choir of angels for the last panel. Your call.
If his headphones are in while you're serving him, then it's both.