If you get sent to jail in Bruma, you will be in a cell with another person named Jorundr. If you punch him once, the jailer will unlock your cell, kill Jorundr, and leave the cell door open. You can now escape from jail by killing the jailer or sneaking out. You can only do this once. Note: Jorundr is a character in the "Two Sides of the Coin" quest. If you kill him, you cannot complete the quest. Do not kill him until you finish the quest.