“Exeter was a walled city and on his arrival William found the rebels manning the whole circuit of its ramparts. In a final attempt to induce a surrender he ordered one of the hostages to be blinded in view of the walls, but, says Orderic, this merely strengthened the determination of the defenders. Indeed, according to William of Malmesbury, one of them staged something of a counter-demonstration by dropping his trousers and farting loudly in the king’s general direction.”
Book:The Norman Conquest