What are your worst "Never-Should've-Done-That" moments?

pls tell meh 1 so I have a proper excuse to *point and laugh at you* Give you a hug. c:

 

Well mainly most of them includes my brother and mom. But Ill tell you something that happenened at school.
This guy stole my agenda so I asked for it back. He said "Whatcha gonna do?" Then roughly, i said Give it now.
Than he said "You wanna fight?" And I was like "Sure" Than 2 of his friends just came out of nowhere, One punched me on the nose, another my ear, and the last one I dodged. Than I had a bloody nose. Meh. Didn't cri. Just groaned in pain.
And I was like "Why didn't I just back off..."
Another one on April fools day I pranked my girl friend c: Than she got really mad at me and walked away. Than I sighed. Why did I do that. But than she got me back. So we were both happy.
This one happens with my brother almost EVERYTIME. So when he rages I start to laugh at him, than he just starts to fight me, my mom finds out, and sometimes grounds us for a day or 2. Thats why I hate my brother.

 

idk if I can think of anything