Problem: Old man is talking to the camera and showing different type of brushes. the man

Answer: standing next to an old chair varnishing the chair.

Problem: A person is seen riding down a long street on a skateboard while the camera follows from behind. the person

Answer: continues riding down the hill with the camera capturing scenery and cars as well as placing his hand on the boarder in front of him.

Problem: How to remove popcorn from your teeth
Use dental floss.
The american dental association recommends using dental floss at least once every day, but especially when you know there is debris stuck between your teeth. This may also include soft debris, which can include bread.
Answer: The starch will turn into sugar and bacteria will grow. Try to work the floss as close to the gum as possible between the teeth where the popcorn is stuck.