This video reminds me on my Hazmat experiences while I was in the oil and gas field a few years back. Hazmat is not ONLY required during/after chemical explosions or biological warfare but also when dealing with very hazardous materials. For my case, we dealt with oil and gas with high mercury content, which is above the minimum exposure level to human (Mercury is very dangerous!). Hence, we need to really protect ourselves from mercury contamination. The following video shows an example of a group of people being trained for Hazmat. You can see people with coverall going through few steps to be cleaned. That's part of the buddy system which requires other people to help us get cleaned up. In addition, a Hazmat team must be well organized so that the activity will be smooth and well coordinated.