M.S.
Very normal for her age. But you can help by leading by example and continueing to put her in these types of situations so she gets practice.
One thing you could do is use words so that she see's you understand. I used to say to my kids, - change the words around as you need - "Oh my gosh, you are really upset, aren't you?" "That was hard not getting all the butterflies, wasn't it?" - Here you've stopped her in her tracks and she's thinking, "My parents understand how I feel!!" Very cool thing for a toddler by the way.. Then just keep the dialogue, short, sweet and simple - "I know it's hard but maybe next time you can get more butterflies, are you ready to play again?" etc...
Don't worry about it and move on, punishing, drawing too much attention, etc.. won't help because she's just not there yet.