I watched a show a long time ago and guy was hunting brown bear and was calling like a hurt animal,he was behind some treestumps out in a cutoverthe griz came out of the timber the guy jumps up and drills it with a arrow at about 20 yards and then ducks back down. The bear never saw him but went apesh!t looking for what stung him and crashed back into the woods, the camera man was about 100 yards behind him, pretty exciting to watch and NOway I'd done it like that. It sure looked like if that bear would have seen him it would have been over for both of them. So the calling does work.