It goes on waaaaaay too long. But its a very good idea and very good. I remember when there was gonna be a perk on mw2 that had something like that but it showed up as a red dot on your enemy's mini-map. THAT WOULD BE SOO NICE,,,
It would be used as a decoy. like you throw it and it comes up on the enemy radar as a red dot so the could try and run towards it and you could kill them as they try.