Kyle Eggimann writes on his blog LuckyGunnar in an article titled "Muscle Memory: Combat-Proven Self-Defense Training Tips":
One very important thing to remember is that while muscle memory can save your life in a defensive shooting situation, it can also get you killed. There are numerous accounts of police officers putting themselves in extreme danger by instinctively replicating behavior that they practiced in training. For example, in Lt. Col. Dave Grossman’s book On Combat, one officer recounts grabbing a pistol out of an assailant’s hands and then handing it right back to him. This bizarre action occurred because in training, the officer would always immediately hand the weapon back to his partner after he disarmed them.
Is this story an urban myth or did it really take place?