Goofs

Alternating shots of the record player at the party show the multi-play arm on and off.

Friday disconnects the power to the record player by rubbing his shoe against the plug connected to the extension cord. This is almost impossible to do in this way if the plug is pushed all the way in as is shown.

When Gerald is brought to the Juvenile Division to be interviewed, his parents are told to wait outside while Friday and Gannon take him into an interrogation room to question him. Juveniles are not allowed to be questioned by the police without their parents or a lawyer being present during the questioning.

This is not entirely true. It depends on the child's age, their development level, the capacity to understand and communicate. Most of the time, as long as they have been read their rights, and they are old enough to understand those rights, they can be questioned without their parents or an attorney present. There are exceptions to this, as there are to most rules and laws, but generally the police can question juveniles without their parents present.

During a long discussion while driving, Detective Gannon (Harry Morgan) is a bit overzealous with his steering wheel movement. Small movements and bounces are often pantomimed to create the feeling of movement in a still car which is filmed to be moving. Yet in this case, the gyrations of the wheel would have caused the car to swerve along the smooth road surface depicted if the car was actually in motion.

When trying to put the pin back in the grenade, Gannon says give me a minute and Friday replies, "We might not have that long." As long as the spoon is still on the grenade, it won't go off. Lacking a pin, the spoon could taped to the grenade. Once the spoon is released, the grenade will go off in 4-5 seconds.