We had a cryogenics demonstration when I was in junior high. The guy took a piece of gravel and placed it on an anvil.
He then put a drop of liquid Oxygen on the gravel.
Then he hit it with a hammer.
BANG!!!
We did several interesting things with the liquid oxygen...
We soaked a cigarette in it, then with the cigarette in a petre dish we lighted it...puff, it was gone!
We heated a carbon rod (one for carbon arc lights in the old time 35 mm movie projectors) in a meeker burner to where it was glowing, then put the tip into a beaker of liquid oxygen...it burned every bit as bright as it would have in the projector.