This came across my inbox the other day. Not only is it good for laugh, but it made me wonder: How many times a day across the world does stuff like this happen?
Never underestimate the power of Common Sense as a good mental foundation.
These contractors are installing the steel pillars in concrete to stop vehicles from parking on the pavement outside a Sports Bar downtown. They are now in the process of cleaning up at the end of the day and anxious to go home.
How long do you think it will be before they realize where they parked?
Grain of Sand 
I love it. It is the old “paint yourself into the corner” trick updated.
Where do they find these people?