Terribly sad news.
Someone mentioned a comparison between the use of nitrogen and oxygen to inflate a tyre. The comparison should only be made between AIR and nitrogen. The use of oxygen for this purpose is highly likely to cause a chemical explosion.
I recall a tragic case at a caravan dealer (next to Blackbushe airport) where two young mechanics used a welding O2 cylinder to inflate a tyre. The resulting explosion blew off the rim of the wheel, into the face of one of them, decapitating him.
The use of oil or grease anywhere near an oxygen cylinder outlet is also likely to cause a similar explosive effect.
Just wanted to clarify this as some of us do come into contact with bottled oxygen and the dangers (of what seems an essential gas for life) can't be overstated.