When someone is taking a picture or video, they might use a flashbulb to light the subject up brightly. This makes the picture or video look very clear and easy to see.
To propel something is to move it forward or forward quickly. You can propel a boat by pushing it with your feet or a motor.
Cinders are the small pieces of ash that are left over after a fire is gone. They are usually collected and thrown away, because they can be dangerous.
To somersault is to do a flip that is half way between a jump and a fall. When you somersault, you are using your body to turn upside down.
To skyrocket is to increase very rapidly in value or popularity. When the stock market goes up, a lot of companies' stock prices will skyrocket.
ludicrously is used to describe something that is so ridiculous that it's not even funny. It's usually used in an ironic way.
Weirder means stranger than usual. When you say that something is weirder than usual, you mean that it is different from what you are used to.
Marathoners are people who run a long distance race. They usually start out by running a short distance race, and then they gradually increase the distance until they are running a marathon.
Waists are the narrow part of a person's body that goes from their chest to their hips. Women often have wider waists than men, and people who are overweight have waistlines that are even wider.