I don't believe this was accurately measured, that is to say I think they're bullshitting us. If the gas was hotter than the core of our sun, where the gas released would literally be melting and boiling. Also, what did they use to measure temperature? Any electronic readings would not work because NOTHING is heat resistant for 2 BILLION kelvins. Also, any thermometer non-electronic would not work either. The liquid inside the thermometer would boil nearly instantly.