Was brewing up my Tuesday flasks to put on the AH after getting a sweet deal on some Frost Lotus (a stack of 20 at like 35g each) and this happened to me. I didn't even know elixir mastery could proc that many flasks. Elixir mastery could be probably the best money-making profession aside from jewelcrafting IMO.
http://img169.imageshack.us/img169/8225/10flaskproc.jpg