Interesting thread. Wylie does this occasionally, but not enough for concern. Marcel has started to do this - sometimes quite repeatedly and I can't get it to stop w/ any of the techniques, like I can w/ Wylie (and, AZKaty's Ralphie is sort of related to Marcel...hmmm).
Here is a link after doing a Youtube search on "reverse sneezing":
http://www.youtube.com/results?searc...&search=Search