🚀 go-pugleaf

I had a shock sensor that worked really well in this respect.  It was years ago
so it may be unavailable.  This sensor was sold by Universal Products, and looked
like a long rectangular tube (with rounded edges).  It had an adjustment that I
used to make it very sensitive.  I did not have any problems with hills as I
mounted it perpendicular to the axis of the car (of course you would have problems
if the road had a steep sideways grade).

BTW, these shock sensors have one big detriment.  After the neighborhood kids
discovered it, they were constantly setting it off for fun.

Gary