Can't believe nobody ever responded to this! REVIVE!
If I were a macro, and I felt I had to sneeze, in a highly populated area... I'm sure I would grab my nose and start focusing very intently on not sneezing, while scrambling to get as far as I could. Unfortunately, knowing my nose, I wouldn't be able to get very far before my eyes would shut. This would make navigation difficult... Then I suppose I'd just struggle with it for as long as I could, trying to let everyone get away, but I know it would explode out of me pretty soon. Can't fight the inevitable.