I feel it’s adequate if people around me are smoking. Fight their smell with my smell.
Then if I can be sure that nobody hears it, nobody I know can smell it and the pressure is too high, just give it a go 
[QUOTE=yojimbo197;2658316]Elevator farts are the best, unless you forget something and then have to ride up with people glaring at you…[/QUOTE]
Had one colleague at work do that a few months ago. Fortunately I was able to hold my breath until the door opened again. 
I think we may need a farting smiley - or is that a fart that the devil smiley emits