So as everyone knows priests have the ability mind control. In some instances (mechanar as an example). You will find that sometimes there is a event where waves of mobs come at you after you kill the first wave. well if your group is running low on mana or needs a little time to heal up before the next wave approaches, what you can do is have the priest mind control the last mob of the wave. This will drop everyone else out of combat to eat and drink, and will also freeze the waves because the last mob hasn't died yet. Downside of course is if your priest is your healer they still can't drink because it requires them to break the channel. =P