There have been plenty of, but a new one called "Psycho Siri" is being lauded as one of the best yet.
Made by andrewm films, the short 4-minute video, which carries the one-line synopsis, "An abandoned iPhone turns out to be a killer of a deal," is quickly racking up the hits on YouTube.
It's got some nice special effects and a couple of memorable lines, including:
"I overheard you saying something about you selling me. I'm afraid I can't let that happen."