That pic of the guy with the truck just cracked me up! I'm still trying not to laugh. Seriously though, a safe version of that would be a handy thing. I have often thought how it could be quite comfortable sitting down working on the underside of the car tilted up at an angle like that rather than lying in the confined space underneath (would be great for concours preparation). To get underneath mine I use some inexpensive stands (probably of Taiwanese or Chinese origin) that are available here from most auto parts suppliers (around 40 Aussie dollars a pair which should be under US$30). They are fairly light weight yet rated to more than enough for my MBs. They consist of square telescopic tubes for height adjustment with a pin that is inserted to lock the tubes together (no risk of collapse as with a rachet mechanism). They are light because the base does not need to be heavy gauge since it is only to provide stability rather than carrying the entire load. The square tube which is in compression carries the load and continues through the base and makes contact with the ground. The only requirement with this arrangement is that they be used on a hard, level surface. To play it safe I always use several support systems (eg. stands backed up by a jack) in case of any doubts with inexpensive stands.

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107.023: 350SLC, 3-speed auto, icon gold, parchment MBtex (sold 2012 after 29 years ownership).
107.026: 500SLC, 4-speed auto, thistle green, green velour.
124.090: 300TE, 4-speed auto, arctic white, cream-beige MBtex.
201.028: 190E 2.3 Sportline, 5-speed manual, arctic white, blue leather.
201.028: 190E 2.3, 4-speed auto, blue-black, grey MBtex.
201.034: 190E 2.3-16, 5-speed manual, blue-black, black leather.