I once read a book that mentioned something like, you cannot yawn with your mouth closed.
But I just did leh? Because there was 4cm cotton above my front teeth to stop it from bleeding (after 8hours alrd) and the doc's instruction was to close my mouth.
So ya, will I be in the guiness world record for this?

Er okay, no.. i understand. BUT I REALLY JUST DID!!!!!!!!!!!!!!!!!!!

P/S I just remembered is sneeze with the eyes open not yawn with the mouth closed... er hehehe....