These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Special Effects Failure: Played for humor in the video for "Zombie Ninjas" - Anytime someone gets attacked by a zombie and their blood splatters, you can see someone hiding behind them squeezing a ketchup bottle.