The uzi glitch actually is an all wepon glitch. You can carry the number of bullets of one to the other by swaping while reloading. Its best done with chainsaw and rifle / barret, since you get 100 bullets.
Too much luck. If you have a damage of 12-24 the avarege damage should be 18. But you will encounter 13 hp monsters, and it transforms to a ~17% (16,666...%) chace of not killing the thing and suffering addtional damage. Since there aren't enought monsters in battle mode to overcome the luck you could this crap have the patience to play untill luck is on your side and there is a greater concentration of less hit kills and dodges. Might as well let the game decide if you should earn the badge before you play battle mode for a long and boring time.
Hummmm. improoved my score by killing annoying collours. But even with "quick cs sniping" (I too was a sniper, god forgive me) and all that the packs + boredom will allways win. No matter how many blues and yellows you get, you need more.
Too hard to tell your size... I just thought that if something bigger appeared you could eat anything smaller. Unfortunally there is no objective way to see who the you can eat.