How not to remove the snow from the roof

When the snow is very high on the roof it should be removed because it is very heavy and can damage the roof of the house.
Usually special tools are used to remove the snow or a string to cut the snow and it will fall on its own.

But these men used another technique. One was at the top of the roof and was holding a rope to the bottom that had to remove the snow.

But look what happened.