attention grabbing

Rafa has developed this funny little thing.  Whenever he wants our attention or is a little upset about something, but not enough to warrant his full out screaming cry, he coughs.  When he first started doing it, we thought he might have strep throat.  He probably just had a cold and a dry throat and did cough a little because of that.  Once he learned that he got our attention, he's continued using that technique to his advantage.  I've tried to get it on video, but the problem is that once I start taping him, he has my attention, so he quits coughing.  This isn't the best example, but you get the idea.  What a funny thing.