It reminds me of one of the things the computer says in Portal. "being hit with the laser may reduce your efficacy as a human being."
and "Please be advised that a noticeable taste of blood is not part of any test protocol but is an unintended side effect of the Aperture Science Material Emancipation Grid, which may, in semi-rare cases, emancipate dental fillings, crowns, tooth enamel, and teeth."
Portal is such an awesome game. I suck at it, but it's so awesome.