In article , Ignoramus23641 wrote:
Would it be safe to work under a jacked vehicle, if I use a mechanical
jack like this:

https://picasaweb.google.com/lh/phot...AhN7B42H-ddOjx
hE?feat=directlink

It's never safe to work under a vehicle that is asymmetrically supported.
Supports should always be used in pairs if you're going to be underneath it.