Now y'see gas and air is like a major no-no for me.
It is the most disgusting foul stuff ever invented and i'm much happier to deal with the pain than taste that crap - which I decided tastes like eating your own vomit after a night on the cider
and then as well morphine does not help me with pain in the slightest, but it does make me do bright green projectile vomitting (the anti-emetic they like to give with it to stop you puking - makes me puke more).