some people have their heads screwed on right ... and some don't.

I tried to think of a subject header but the various combinations of "head" and "screws" gave me the vapours! Mercy !
You have to be careful when screwing on your head not to cross the threads!
There's the old one about keeping an eye on the goal, a shoulder to the wheel, an ear to the ground, a hand to the wheel and then trying to work in that position.
wow