A meringue is really nothing but a foam. And what is a foam after all, but a big collection of bubbles? And what's a bubble? It's basically a very flimsy little latticework of proteins draped with water. We add sugar to this structure, which strengthens it. But things can, and do, go wrong.
Alton BrownI love to have battles of the wits with people that can dish fast and dirty - and it leads to problems occasionally, 'cause I can sound mean without attempting to be mean.
Alton Brown