Falling off a roof, or off a ladder, can be a "career ending move". I used to be a car mechanic (and electronic technician). That ended when I got run over by

Falling off a roof, or off a ladder, can be a "career ending move". I used to be a car mechanic (and electronic technician). That ended when I got run over by a car. I no longer bend too well in the middle - not enough to crawl under a dashboard or car. While I was recovering, my company needed some stuff done that I felt needed to be computerized: one customer was stealing $18k-30k per year because our shipping/receiving system was terribly flawed. Of course it was my fault for pointing that out.