Is there anything better than running off a chain of 2 or 3 big sneezes? I can't think of anything.
How bout when you let a big one fly - a "ahhh's ahhh's" type of sneeze. You let her go on your arm and right as you are ready to depart you realize that you've just snotted all over yourself. Perhaps it is even stringing from your face back onto your sleeve. You sit there for a moment or two, thinking to yourself that in all your years of preparation and practice you have basically just imploded the sneeze all over yourself.
This can be expounded by the model of shirt you are wearing. If its a tee you are so screwed. You are gonna have crusties on your upper arm hair all day. A hoodie is probably best case scenario unless it's black.
Also, depends on the company you keep and their acceptance levels. You can be highly ridiculed for it. Especially now. (See: Swine Flu).