During their basic military training, candidate student officers learn, among other things, how to respond appropriately to Chemical, Biological, Radiological and Nuclear (CBRN) threats. They receive expert explanations on this from specialised instructors from the engineering units.
It is very important to be able to perform the newly learned reaction drills quickly and correctly.
These skills are therefore put to the test during a final exercise, where wrong or too slow actions can have unpleasant (yet harmless) consequences.