Yep, that there is a space flame. In zero gravity, puny Earth things like buoyancy and convection don't exist. So when you light a match, the carbon dioxide goes nowhere. It just gathers around the flame like hobos around a barrel fire. Meanwhile, the flame keeps happily engorging itself with oxygen until the hobo CO2 all around it snuffs it out.
Left: Normal flame. Right: Awesome ball of space fire.
That flame shape you're used to can only happen because the fire forces hot air to rise upward. Since none of that really happens in zero gravity, the flame just expands in all directions in a desperate search for random oxygen particles. Essentially, this means fires in zero gravity are lower in temperature, consume less oxygen, are dimmer in terms of brightness ... and totally float around like fireballs if you, say, ignite a floating drop of gasoline.
How astronauts resist the temptation to start mage duels the second their spacecraft leaves the atmosphere, we'll never know.