I no longer work in retail, but what I witnessed one year whilst working at a hardware/home improvement store was both frightening and hilarious. Well. It was about 10 years ago, when "singing" Christmas decorations were all the rage. The store I worked in had a singing Christmas tree, a singing little drummer boy, a singing Santa Claus...you get the picture. But, for some strange reason, the most popular singing Christmas decoration was...a singing yule log:
I worked at the customer service desk in the middle of the store, right next to the large shelf where displays of each singing Christmas decoration were kept. It drove me CRAZY hearing them all singing simultaneously for 8 to 12 hours a day, from right after Halloween until right before Christmas, but that's beside the point. The funniest/saddest (in the sense that "people actually behave this way over CHRISTMAS DECORATIONS?!? Really?!? REALLY?!?!?) thing I witnessed whilst working retail during the holidays involved...physical violence, with the weapon being an anthropomorphic, singing yule log.
The scenario is as follows:
Customer 1 (we'll call him Jack) puts the last boxed singing yule log in his basket, much to the dismay of Customer 2 (we'll call him Joe).
Joe: "Hey! I wanted that!"
Jack: "I'm sorry; maybe they have more of them in the back?"
*Joe walks up to the customer service desk, where he is told that Jack indeed has the very last of the boxed singing yule logs, but that Joe would be welcome to purchase the display singing yule log, at a 50% discount, rather than the 25% discount that Jack's boxed singing yule log would be purchased at. Clearly, this is not good enough for Joe*
Joe walks over to the display, unplugs the singing yule log, and hurls it at full force (Joe is a pretty big guy, and would make a great pitcher in the big league, what with his forceful throwing technique) at Jack, and says something thoroughly inappropriate regarding Jack's perceived, uh, romantic preference, and what he can supposedly do with the singing yule log.
Joe (to Jack, after inappropriate & not family-friendly tirade): "YOU take THIS ONE. THAT one is MINE!"
*cue employees & customers alike gathering round and making these type of faces:

*
At which point, several guys from out in the lumberyard come and escort Joe out of the store, after telling him that if he doesn't leave, and never come back, that the police will be called. Jack is profusely apologized to by various employees and the manager, and is given the singing yule log gratis for having to deal with that.
All that trouble, over a silly, antropomorphic, musical plastic log!