Am I too old for this kind of reaction?

I'm almost 14 and from Mississippi. Today when I got home from school I got in a fight with my mom. I have been very mouthy to her recently, and I admit I am in the wrong. Today I got much uglier and went further than I ever had before, and my mom gave me a . In fairness, she did warn me, but I didn't take her seriously (just didn't think she'd go that far at my age). I talked to her about it afterwards (we have a great, open relationship) and she said that since nothing else was working, and since she knows that pain is what I fear the most (which is true), that she was left with little choice. I guess I'm just surprised that this happened at my age. I haven't gotten a in' since I was like 9 or 10, and I hadn't even been threatened with one in a year or two. Although part of that is because I am mostly pretty well behaved. I don't want to start off a whole debate (I'm not anti ), I just was shocked that this could happen at my age and wanted the thoughts of other parents on what happened. Was my mom as out of line as I feel she was? Or was she spot on?