Dennis Haskins, AKA Mr. Belding interrupted everything, and shook her hand. SHOOK HER HAND! They spent years together, but there's clearly some bad blood now.
People are saying she was just surprised, but COME ON. Even his excessive weight gain [probably thanks to all the college parties he's been going to these days] shouldn't make them only shake hands and make her look like she's using every muscle in her body to fake a smile.
I think it's safe to say a Saved By The Bell reunion won't be happening.... never mind the whole Screech-writing-a-tell-all issue... Hmph.