While construction workers may be some of the most skilled professionals in civilized society, constructing the buildings we live in, the roads we drive on and even the infrastructure that gives us luxuries like modern plumbing, not every building site — or completed job — is perfect.

While accidents can and do happen in any field, construction zones up the ante with power tools and massive equipment, a fact that stinks for the workers but is really amusing for us.

From excavator fails to extremely tenuous engineering solutions,  here are 20 construction oopsies that would leave OSHA shaking its head.