Oxygen tanks can explode if the gas is ignited. why is this?

If it is to a certain temperature in the oxygen tank then the heat will start to cause pressure and it will start to bust open and explode all because of the heat and pressure.

I believe the answer is Fair Use Doctrine.
Several criteria for a project to be considered as a fair use are:
- the usage of copyrighted materials is conducted for commentaries.
- The usage of copyrighted materials is conducted for educational or other non-profit purposes
- The usage of copyrighted materials is conducted by changing the entity that made up the materials.