That wacky David Letterman is at it again, this time showing us that Democratic Speaker of the House Nancy Pelosi can hardly blink back her tears of laughter during President Bush's State of the Union address.

Actually, it's unclear whether Pelosi's chronic eyelash-batting was the result of a recent lasik eye surgery (translation: lid lift), an annoying facial tic, or merely a nervous habit triggered by the pressure of forcing herself to "not zone out" during Bush's televised speech.

Either way, Dick Cheney (also in the background) masters the whole crazy, non-blinking Scientologist thing, and takes stoicism to a different level, prompting the following comments from YouTube users:

boo1312: hahaha Dick Chaney is sitting there like a block of ice.

flarkfucky: The reason Cheney doesn't blink is because he is a Cyborg.

dvdrink: get that woman some visine

Frankly, we're just impressed she managed to stay awake at all—which is more than we could do until we finally flipped over to American Idol out of boredom.