Do not bother to exert yourself physically. Take your handbag and pretend to go to the ladies but instead go up to the waiter to order an absurd amount of food (preferably the most expensive items on the menu). Leave the restaurant and leave him to foot the bill. If you wish to be more direct, tell him that you are not going to sit through another minute of torture, thank him for the meal and leave. Remember to tell your friend about the incident so that he/she does not set that jerk on another blind date and spoil someone else’s day.