Insultingly Stupid Movie Physics debunks one of my pet peeves in movies, where a character who gets shot flies backward with great force from the impact of the bullet. The site calculates that actually the force imparted on the victim will be less than or equal to the recoil of the gun.
"If the recoil from discharging a firearm is insufficient to throw the shooter backwards through the nearest window then the bullet also will not throw the victim backwards through the nearest window."
The site also points out the unrealistic sound in movies. "SWAT teams sometimes use silencers, not for stealth, but to insure that they will be able to hear if one of the SWAT team members fires a shot inside the confined space of a room. Discharging an unsilenced firearm in a room can cause temporary deafness."