It sounds like a very common condition that is nothing to worry about
: reverse sneezing.
If you're concerned, search for "reverse sneezing."
Here's one I found just now, and it includes a video.
http://www.yorkietalk.com/forums/showthread.php?t=78517
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Mike ~ Doting Dad to Jillie, Harper, Molly, Cooper, Eddie (RIP), Lucy (RIP), Rusty (RIP) and Jack (RIP).
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