I learned my lesson today

I confused again.
What was your screw up other than saying you had completed the job when the old fitting was still in place?
Did you "round it off" yourself by using the wrong socket?
I'm proud of my mistakes due to their rarity.
Well, I don't mind admitting them anyway at work anyway.
To make no mistakes, do nothing.
Where is my "Don't rush me. I need time to F it up" bumper sticker?

Oh and by the way.
I hope you are not using a claw hammer to hit metal stuff.
It has a hardend surface and can chip fracture and put your eye out.
That's the theory.
Get a ballpeen.