Liquid oxygen is definitly the oxidizer, we used a lot of it in the A.Force. It is not something to be played with and will violently reaction with almost anything it can mix with and will freeze everything else. special precautions were taken to assure when LOX was loaded on board a aircraft that the over run did not fall on the ground because if it hit the tar between the concrete it would explode. similar to what killed three of our astronauts at the cape. we quick froze many mice with a fast dip.
I trust your holiday was a good one!