They're called "one-shots." I'm not talking about Massively's snazzy screenshot feature -- I'm talking about any player being able to kill another player in effectively one hit, from maximum health all the way down to zero. In a forum post by "Deathanddecay," there's apparently a big argument among himself and some friends as to what exactly counts as a "one-shot." Does it have to be like a Pyroblast critical strike? Or can a three-in-one windfury proc count?
For my part, the distinction seems unimportant. Either way, you're dead before you have any chance to react and defend yourself. This sort of thing used to occur all the time before The Burning Crusade came out, but since then players' stamina has increased faster than their damage, so one-shots tend to happen a lot less. Now that the expansion's been out a year, however, if one player is in the best gear while another just hit 70, it could definitely happen quite a bit. What's your experience with one-shots? Do you prance around gleefully decimating your helpless opposition without effort? Do you dread going to battlegrounds for fear that you'll just die without being able to contribute anything? Or do you find that everyone is more or less balanced and one shots don't happen much anymore?