Also, don’t lie to a real locksmith about having an emergency.
A locksmith I met told of being called to an emergency lockout - a man had locked himself out while food was cooking on the stove. The locksmith arrived and picked open the deadbolt, then inquired about the stove. The homeowner said, “Oh, I just said that to get you to hurry.” So the locksmith then picked the deadbolt closed, said “No charge” and left the homeowner locked out of his house.
Don’t know if the story is true, but it ought to be. 
