Russia testing it's advanced ICBM propulsion design.
I saw an O2 tank go off like that,some idiot moved a full tank without the safety cap on,supposedly he thought it was empty. It didnt go in a straight line like your little gif,mostly spun around in circles but it did manage to hit a loading door and put a large dent in the lower panel.
I just jumped into a block walled room where they stored all the explosive shit,figured it was the safest place to be.:tremble