Never work on an elevator unless you are absolutely positive you have total control. I've heard so many sad story's. That little bit of saved time is just not worth it. I could go on and on but you guys know what I'm talking about..

It Don't mean a thing if it aint got that swing.

Cool, Free, Johnny Smith courtesy of NPR..HERE
http://www.npr.org/ramfiles/asc/asc25.smith.asx