something funny i think

hey all!
ok well i found something funny when i was playing crossfire on saturday, so i was playing ghost mode and these players were calling each other hackers and one of the guy on the gr team said how im i chamming you cant see the ghost because of the fast delay disapperance and the BL said its called "box" and i was like wtf is a box? and then i got kicked >.> lol. and my score wasnt even that impressive. D:
so i thght tht was funny? but i still dont know what box is?! O.o