#5 Silencers Turn Gunfire Into a Gentle Whisper
Cautious spies and assassins know that if you're going to take out a bad guy in an office or a library, be sure to use a silencer. It turns the concussive "bang" into a neutered "ptew."
Exploding gunpowder is loud. Really loud. As loud as a jet engine. A little metal tube won't do a whole lot to stop that. This is what a suppressed handgun actually sounds like:
Gun myths from the movies debunked
From the "viral-est" blog post of the day, on Cracked: 5 Ridiculous Gun Myths Everyone Believes (Thanks to Movies):