Allboys the fact that you can see it, feel bad, and can admit to it...
IMHO it would be worse to go around thinking you never get it wrong. And you're not alone, I think most of us have had parenting moments we aren't particularly proud of - I certainly have although I can't remember any off the top of my head I'll come back later if I think of any...

I am a member of this club on more days than not because my "artistic temperament" is just another way of saying I can throw tanties as big as my 3yo! LOL
Bathsheba I had to laugh when I read this, I have had some EPIC tanties while I was PG made the kids