I like it how people can take a .50 cal bullet to the chest and just run through it.
I do like the throwing knives though, admittedly I'm completely useless with them but it's always a laugh futilely throwing your knife from one side of the map to the other.
That'll be the rubber bullets again!
I totally want to get a match winning kill with the throwing knife. Pity you can't save you're match winning kills.