Blind

A few months ago Patrick was horsing around and pulled down the window blind in my bedroom. My father came out and fixed it with much hullabaloo.
Today Patrick was playing with it again and I warned him to leave it alone because if it came down, he was going to be in serious trouble.
Not 10 mins later he was hysterical crying telling me how sorry he was.
He pulled the blind down again.
I'm holding my head in my hands right now.
This kid is seriously going to be the death of me. Mike is going to KILL him tonight.
I can't decide if I should call and give him the heads up now or wait till he gets home...