A scrim will appear entirely opaque if everything behind it is unlit and the scrim itself is grazed by light from the sides or from above. A scrim will appear nearly transparent if a scene behind it is lit, but there is no light on the scrim. A dreamy or foggy look can be achieved by lighting a scene entirely behind a scrim.
Food or small objects can cause choking if they get caught in your throat and block your airway. This keeps oxygen from getting to your lungs and brain. If your brain goes without oxygen for more than four minutes, you could have brain damage or die. Read more on MedlinePlus.gov.
When someone aspirates, a foreign object, such as food or water, enters the person's airway. This generally results in coughing or gagging in an attempt to clear the foreign object. Choking results if the object blocks the airway. If the object ends up in the lungs, it can cause pneumonia.