Oh Sh*t is what I'd be saying.

I'd be trying to help you fix the shed and doing something about the car BEFORE dad got back lol. My dad would figure if I wasn't doing something about it before he came back I wasn't doing things quick enough!

The phrase "Take initiative" is something that was drilled into my brain from a young age lol.
Don't wait for people to tell you to do the right thing, just do it!

I hope the kid knows how to build a shed