Oxygen users safety warning here with Butane lighters and child safety covers on the strikers.
Even when they claim an elderly person on oxygen blew up it wasnt due to smoking it was due to a faulty bic/propane lighter valve leaking into the mask because of the child safety band they put over the striker to the flint. What happens is the mask is open while they wear it to lite a smoke,it becomes an enclosed space as the butane rises in the mask mixed with oxygen. The person strikes the lighter 4-6 times before it ignites the lighter,by then the mask has a large leaked in fuel source and all that is needed then is a heat source and KABOOM. So if anyone is reading this its very easy to remove the child proof band over the striker with just a pocket knife,simply pull up at the top and back it will fly out without damaging the lighter. THATS A SAFETY TIP they wont tell you about at the local fire marshalls office.
This safety tip was brought to you by an anti-government member of the underground freedom movement.