clacking teeth

Things That Turn Me Into An Emotional Mess:

Anything related to Lost.

Anything related to Firefly.

Anything related to Spaced.

The end of Donna and The Doctor, along with the scene where The Doctor takes the radiation to save Wilfred; including the speech before it. Tears! ;_;

That one episode of Futurama with the 7-leaf clover, when Yancy is naming his kid Fry. BAWWWW.

Many other things, but none that come to mind currently.