Afraid for life?
Ok.
Again? Really?
<Sent from phone. Typos possible.>
If the perp did indeed have a screwdriver, and it sound like he had it in his hand, that would be cause for concern.
We did have a case not too long ago (last year, maybe) where a driver mistakenly pulled in to the wrong driveway and was shot by the home owner. The home owner did not fare well in court.
Just because somebody turns around in your driveway is no excuse to chase him down. Since I live in a cul-de-sac with only one way in and one way out, I could get plenty of exercise chasing people down for turning around in my driveway. It seems that many drivers don't understand English or think that signs bearing "No Outlet" and "Dead End" are rock bands.