I slapped my 10yo son across the face and manipulated him into keeping a secret
How cruel can you be? Why did you have to slap your 10 year old?
He was being annoying, I just wanted to slap him one time.
It's not right to slap your child. That sort of behavior is abusive and cause lasting damage to the child. If he does something you don't like you should explain why it's wrong, not get physical with him.
Do you want me to slap you once?
I don't think you should slap anyone. I think you should consider talking to a counsellor or other professional about your anger issues, so you can have a better relationship with your child, and everyone else.