You cough lightly and unexpectedly and feel like your insides have just been propelled through your burning incision and splattered on the wall across the room.

And you ate bemused at the timing of everything, like the nice lady chaplain who stops in right when you are watching the scene from Indiana Jones where the snake is slithering out of the skeleton's mouth and feel somehow untoward about a film you watched a million other time.

She did say a very nice prayer with me after that ;)