In 2016, Manchester United was set to play the last game of the season. Very important game, would determine whether they made the Champions League or not. But then: horror.

One of the stewards discovers a pipe bomb in the bathroom. Immediate code red situation. The game is stopped. The authorities begin evacuating the stadium. The bomb squad is called in.

The bomb squad do a controlled demolition of the bomb. It is safely disposed of. Slowly, the news of their discovery trickles out: The bomb was a fake. I've seen pictures of it, it's quite convincing, but it could not have actually detonated.

So now the question is, what asshole was trying to scare everyone with a hoax bomb? The authorities already have the answer. The fake bomb was planted... by the Manchester United security team.

It was part of a training exercise. And they forgot to go get it.

This mistake cost Manchester United 4 million euros.

So, really, any bad decision you've ever made on the job, think, was it really that bad https://www.timesofisrael.com/manchester-united-faces-multi-million-bill-for-bomb-fiasco/

They didn't make the Champions League that year, incidentally