All this reinforces my belief that well, you never know the time or the day...
I use ratcheting jackstands, and have noticed that the hydraulic lifts at garages are also ratcheting stands (at least those that I've seen). With a car on it, the pressure on the ratchet is intense and I really don't see how it can be knocked loose (I try though, every time before sliding under).

Sorry it happened to that guy with the beemer...seems like he it was a freak accident, which again, reinforces my faith. Personally, I wish I had the Airjack that the W123 Expedition guy uses. Everytime I do something, its either the regular tire jack or the ramps.

As for changing oil, the W123 is high enough that I don't even need to raise the car.

Be safe folks. An ounce of prevention goes a long way....

__________________
1987 300TD
1984 300D
755,000 KM and going strong
BC Canada