I've been watching a lot of MacGyver lately and have just one questions for any villains out there reading this: Why do you not just kill the bad guy?

Over and over and over I have seen bad guys on TV shows and in movies get the hero into a tight spot and then...they gloat, they accuse, they ramble on and on and do anything but kill the hero which would arguably be their best move. They create elaborate methods of killing the hero and then leave the room trusting that it will work. As opposed to the tried and true method of just shooting them. The scenes generally look like this:

The bad guy walks up to the hero who is tied up on the floor. The bad guy puts the gun to the hero's head and...then pulls it away saying, "You honestly thought you could fool me? I'm going to kill you of course, but first, I'm kind of curious how you found out I hid the gems in the turkey. Was it the professor who told you? I knew he couldn't be trusted...." By now, of course, the hero has untied himself and built a smoke bomb out of his shoelaces, an apple, and the ace of spades.

Heroes aren't perfect either though. In all the comic books I've read they all seem to have a bad habit of announcing themselves before they jump the bad guys. Batman will spend half an hour sneaking to the top of the museum and locating the room the bad guys are removing priceless artifacts from, then, instead of quietly lifting the skylight open and rapelling down and surprising them with a sneak attack, he'll jump, smashing the skylight, land 50 feet away from the bad guys, yelling, "CRIME DOESN'T PAY! I'm Batman. Don't move or I'll--I said don't move! Argh, this is vexing! Don'tmovedon'tmoveDON'TMOVE! Come on guys, you--you guys have guns???"