Here's an awesome view of the fiery power that is a rocket. A GoPro camera is strapped inside this rocket test so that rocket scientists can get a view of what's going on inside. It's pretty amazing, the fire burns so hot that you can almost feel it through the screen.
Rocket scientists incorporate a number of different testing techniques before committing a rocket to flight. One of those tests is called a "static test." In this setup a rocket engine is fired while being anchored to a test bench. Fitted with instrumentation, the scientist can safely measure thrust, pressure, cooling, and other rocket data. Watch and witness from inside the inferno when something goes wrong.