Why superheroes hide their powers from their friends.

I have a secret power. Not faster than a speeding bullet or more powerful than a locomotive...can hardly leap a sleeping dog in a single bound, but I discovered an ability more powerful than any of those.
Let me clarify. Yesterday after an incredibly long day, I had a relaxing pedicure and then stopped at the grocery store on the way home to get potato chips and milk. Hamburgers were planned for dinner and I was elected to swing into Pick N Save for the chips. Milk was an added request that I received via text on my way out of the salon. I was not enthused because it was raining and chilly and I had to leave the car to run to the store and then out again and when I got home no one had so much as opened the burger buns. So guess who had to pull the burgers out, season them, toast the buns as they were not completely defrosted...put out the condiments, set the table...you got it! Me! And I had been at work by six that morning and it was already 7pm...boy was I pissed!!!
So I didn't talk to anyone and just threw things around the kitchen and got it all done and when I had to say grace at dinner, it was short and not very sweet. Bless this food - amen...because bless this family and friends and dinner was too much for me to ask cuz I was MAD!!
Then I heard my son snap at his girlfriend and she snapped right back - and my husband whined at my son who retorted rudely and then we had the quietest dinner because no one was talking to anyone. And I realized that by walking into this quiet group and going on the attack immediately, I had discovered a super power. My power deflated all good will, discouraged all pleasantries and destroyed the evening for everyone. What had I done?
What if I had approached my family with warmth instead of anger? We'll never know what it would have done to yesterday...I can't change that. But by hiding my power I can change today. And tomorrow will be better.