From the "You Can't Make This Up" Files

Pub evacuated after Monty Python prop mistaken for grenade

[A]fter nearly an hour of analysis bomb experts realised that the cause of the scare was in fact a copy of the “Holy Hand Grenade of Antioch” used by Eric Idle to slaughter a killer rabbit in the 1975 film Monty Python And The Holy Grail.

Thank goodness nobody said, “Ni!”