In article ,
Larry Jaques wrote:

[...]

have a seatbelt at all. In either case, be very careful about the ground
you are moving over and operating on - they can take a lot, but when
they get to the tipping point, there's little if any time to recover.

And here's what happens when you tip it:
http://www.craneaccidents.com/drp.htm Don't Do This!

And although totally on-topic, don't do this either:
http://www.craneaccidents.com/dummy/contraption.htm (:

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