There was once a survival course for military units. three units attended, from the S.A.S, the paratroopers and the police.
when they got to the camp area, the guide/instructor told each unit to got into the bush and get a rabbit. the S.A.S. are first, and they assume possition, and sneak off into the scrub and dissapere. Soon everyone waiting hears a single shot, and the unit returns soon with a huge rabbit shot cleanly between the eyes. 'very good' says the instructor, 'para's next' so the para's fix bayonets, don camo and rub dirt into their faces. then they charge with machine guns, hand grenades and mortar fire. things are exploding, guns are going off and eventually the parra's return with the chared remains of a rabbit. 'a bit messy, but you got the idea, ok police now' says the instructor.
so the police all get in a line, and with hands behind their backs walk into the scrub. everything is quiet exept for the occasional sound of a radio crakleing "Sierra Oscar one three four nine dogs balls to one eight four three cat piss, suspect heading your way over" and things like that.
after hours of waiting, the police emerge with a possum in handcufs. "what are you doing?!" shouts the instructor"thats a possum, go get a rabbit, like i told you to hours ago".

so the police head back into the scrub, and it is silent for hours, that turn into night, and then finnaly, the next morning, the police emerge with the possum, still in hand cuffs, but covered in bruses.
the instructor sees this and goes mad "WHAT THE *&^% GET A %^&*ING RABBIT LIKE I SAID!!!"

the seargent walks forward and nudges the possum. "OK, OK" he says "Im a F***ing rabbit"