A panic attack is an exaggeration of your bodyâs normal response to fear, stress or excitement. It is the rapid build-up of overwhelming physical sensations, such as: 1  a pounding heartbeat. 2  feeling faint. 3  sweating. 4  nausea (feeling sick).
Since four elements must be present for the combustion process to occur (fuel, heat, an oxidizing agent, and a chemical chain reaction), a fire can be extinguished by removing any one of these four elements.
In a combustion reaction, a substance combines with oxygen, releasing a large amount of energy in the form. of light and heat. For organic compounds, such as hydrocarbons, the products of the combustion reaction are carbon dioxide and water.