Actually, I just had a headache.
However, if you phone in and tell management that you have a headache, they tell you to take a pill and suck it up. Fortunately though, they’re too squeamish to argue when there’s any mention of diarrhoea, which is kind of a shame, because it would be an excellent opportunity to tell delinquent members of staff to get their shit together.
Of course, like all other Jedi Mind Tricks, it should not be abused. For that path to the Dark Side leads. Yes.