Any accident foreseen in this frame?

A hydraulic excavator lifts up a concrete pipe weighing approx. 1.2 tons with a hook attached to the bucket and is about to lower it to a 4.7 meter-deep gutter for burial. Now what accident do you anticipate from this picture?

This is the accident resulted!

While it was lowered, the concrete pipe hit a brace for the gutter. The wire rope slackened momentarily and let itself slip off the hook. It went straight down, directly hitting a worker below. He was killed.

Tips for forestalling similar accidents
1.	Do not make an unauthorized use of the hook attached to hydraulic excavators.
2.	Carry out a check of the hook prior to the start of the day's work.
3.	Always take good care of a latch system for the hook.
4.	Limit the max. lifting weight to less than 1 ton. And do not exceed the machine's max. lifting capacity, either.
5.	Do not go under hung object, while in operation.

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