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.
What do you do when someone is choking? Try to get the person in a sitting preferably standing position, get behind him with your arms around his waist, making a fist and quickly pull upwards. This will deflate the â¦stomach and push up the diaphrams and so blow air through the oesophagus disloging the food.