Crane collapses while lifting concrete wall - GIF

Crane collapses while lifting concrete wall.

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Previously:

Crane collapses due to bad rigging - GIF
Crane collapses into house in Long Beach - GIF
Crane collapses while lifting jumbo jet - GIF
Crane collapses while lifting wind turbine blade and hub - GIF
Crane collapses while pulling bus out of river - GIF

Everyone was lucky - exactly what was the plan to secure that wall once it was vertical?