I worked at a Macy's in college one holiday season, right across the aisle from the dancing santas that alternated their tinny versions of "rockin around the christmas tree" and "jingle bell rock". The tinny sounds on top of the general background muzak was extra-insanity-inducing. One day after being at work for 10 hours I got in my car and jingle bell rock came on and I totally broke down crying.

I've a lot of sympathy for retail people since then.