I really dont fully understand how the LFR loot system works. I just started LFR in Mists and for every boss, no loot drops, but i use a coin to get the chance at loot, and then if with that coin i roll high enough i get a radom piece from the boss loot table. Is this correct? and if so does that mean as long as i have coins i can try and get loot off the same boss even if i already killed it?