Macrovision
A mean-spirited video copy block that messes up your VHS if you try to record from two machines at once. It's like the video world's version of a temper tantrum.
"I tried to copy this movie, and my VHS started throwing a hissy fit.", @VHSFanatic99
"Macrovision is like the video world's version of a child's meltdown.", @DVDHater42
"My VHS started acting like it had a bad day when I tried to copy this movie.", @RecordedRage"