Somewhat like my friends suggestion, I personally like his better, but, their both nice. His suggestion : If a bullet is fired within 2m of you, then you can't ALT+F4 until you move 50m from your position, and another bullet is not fired.
Just a texture bug Go into ESC<Options<Video options<Advanced Video Options<Turn Video Memory to Default Fixed it for me. Or, Hit M to bring up map<ALT+TAB out of game< ALT+TAB back in<Exit map I heard this also works ^