when we see videos like this and you are constantly being told at work to be safe, this is what they are talking about. In this example, the employee was overworked. Managers should have caught this, although is difficult to put blame on the supervisors because if the employee was tires, he should have said something. However, the facts are not known on this video but it is a good example how small mistake can snowball into something bigger that can put lives at risk, not only your know, but also the lives of your co-workers.