A large group of Taliban soldiers are moving down a road when they hear a voice call from behind a sand-dune: "One British SAS soldier is better than ten Taliban".
The Taliban commander quickly sends ten of his best soldiers over the dune, whereupon a gun-battle breaks out and continues for a few minutes, then silence. The voice then calls out: "One British SAS soldier is better than one hundred Taliban."
Furious, the Taliban commander sends his next best hundred troops over the dune and instantly a huge gunfight commences. After ten minutes of battle, again silence. The voice calls out again: "One British SAS soldier is better than one thousand Taliban."
The enraged Taliban Commander musters one thousand fighters and sends them across the dune. Cannon, rocket and machine gun fire ring out as a huge battle is fought. Then silence.
Eventually, one wounded Taliban fighter crawls back over the dune and, with his dying words, tells his commander, "Don't send any more men. It's a trap... there's actually two of them."