1. - No PC gamer has a 5 button mouse, and even if they did they wouldn't want to use buttons 4 and 5 for anything in game anyway.
2. - Improved graphics now means it looks good on an XBOX 360. If you're unlucky enough to be a PC gamer, it means "Sorry, we had to make this run on an XBOX, so you get less collateral damage effects, smaller explosions, and lower rez textures."
3. - Shotguns blow people up at close range. We're talking all that's left is a cloud of blood. No wonder PETA objects to hunting, all those deer are being disintegrated!
4. - Old women have a much better chance of surviving in a combat zone than trained soldiers.
5. - Coffee tables will completely stop any number of high caliber bullets.
6. - Body armor will stop several rounds from a firearm, but will cause you to die if punched just once.
7. - In the event that somebody's illegal experiment goes wrong, don't worry! They will leave all sorts of evidence of their illegal experiments lying around so that you can figure out what they did.