Terrible Two's

Chelsea and I went to Walmart today, in search of some big girl panites (don't ask how potty training is going--it's NOT going) and she threw a fit. Now she *is* two, so yeah, that is to be expected, but she is usually good in stores. I threatened to leave if she didn't settle down, and she refused, so we left the store. All the way home, she asked where we were going, I told her "home" cause she acted like a baby. Who did I actually punish, her, or myself? I left a cart full of stuff we needed, right there in the middle of the aisle.