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.
Spontaneous Combustion, Chemical Reactions and Fire. The results of chemical reactions that occur during spontaneous combustion are light and heat. Assuming a fuel is present, the heat is often enough to start a fire. Consider these examples: Spontaneous coal combustion: Coal can spontaneously combust if thereâs enough oxygen available and the heat produced by the coal is not dissipated fast enough. The vicious cycle causes thermal runaway and a fire starts.