Concrete mixing mishap - GIF

Concrete mixing mishap.

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Previously:

Compilation of construction mishaps - GIF
Family on scooter mishap - GIF
U.S. Navy aircraft carrier landing mishaps and crashes - video

Gee I wonder why that happened?

I especiallylly like his co-worker laughing at him, while calmly corralling the whatever he was using help it mix..."Betcha won't do THAT again!"