The oxygen doesn't burn, but it facilitates the burning of other things. The more oxygen, the more burning. That's mainly why Apollo 1 burned up: 100% oxygen inside.

See also Ronnie Lane.

No Remorse
Fuel
Harvester of Sorrow
Welcome Home (Sanitarium)
For Whom The Bell Tolls
Master of Puppets
Sad But True
Motorbreath
Seek and Destroy