Question: This question is about the mistake where a SWAT officer has a magazine backwards in his MP5. I know this would be impossible on a real weapon. But, how could it have happened in filming? Rubber cast weapon? Very badly worn prop weapon? Set armourer with a hammer and no clue?
Question: In a few episodes, the FBI agents will walk into a room and say "smell that?" and the reply is "shots fired", supposedly because they can smell the distinct odor of burnt gunpowder. Then they'll look behind a desk and find a dead body in a pool of blood. But wouldn't the smell of a dead person, or the blood, be way more overpowering? Or would it take too long for a dead body to start to smell? And how long would the smell of gunfire in an enclosed room last?
Answer: Craps is a casino game where players bet on the outcome of a dice roll. It deals heavily with probabilities and is a favorite of math experts like Charlie. Whatever the odds, though, your chances of winning are much greater than winning the lottery.
If you bet against the roller in craps, your odds of winning are about 49%, which is as good as you get in Vegas. The point he's making (though it's pretty obscure) is that if you're going to bet, you may as well bet on something where you have a slim chance of winning, as opposed to the lottery, where your chances are basically 0.