Final answer:
In a safety demo, the initial focus is often on the location of essential safety equipment, including the fire extinguisher and eyewash station, to ensure quick emergency response.
Step-by-step explanation:
The first thing typically presented in a safety demo, especially within a laboratory or construction site context, is the location of specific safety equipment. This may include items such as the fire extinguisher and the eyewash station. Knowing where these items are located is crucial for maintaining safety and ensuring a quick response in case of an emergency. In the case of construction sites, safety helmets and other protective equipment are also emphasized due to their importance in preventing injuries.