Sara's car accident angle back in 2001. The single most pointless angle in the history of pro wrestling.
First, Undertaker leaves Raw because he finds out his wife Sara has been in an accident. He later finds out that it was all a hoax, and Sara was fine, so now he comes back to get revenge on the person who made the call. He thinks it's Austin, but he denies it, saying it was HHH (I think), and they basically spend the rest of the show passing the buck around, until Austin comes up at the end and says "It was me all along". Just a complete waist of 2 hours, and we ended up right back where we started.