Shan Fit

One day the Shah of a middle-eastern country decided his son the Shan was old enough to have a body guard. He searched his kingdom until he found the right person for the job. As it turned out, he was well suited for the task and watched after the Shan dutifully. As the Shan got older, the body guard decided he could probably slip off for awhile without consequence. As luck would have it the Shan was epileptic , had a fit and died while he was gone. When the Shah found out about it, he called the body guard and asked:

Where were you when the fit hit the Shan?