I just heard of something scary from a local law enforcement officer, but I have doubts about it being true. He stated that a new crime method has been seen where one perpetrator starts to "dance" near the drive'rs window when a car is at a red light, capturing the attention of the driver. The second criminal strikes the front bumper of the car with a 5-lb sledge hammer, activating the air bag. The first criminal then smashes the driver's window and drags the confused driver out of the car for whatever mayhem they have in mind for the driver. My question is: would a 5-lb or other hand held hammer striking the bumper really be enough force to activate the airbag?