"Excellent! That is quite correct." The face smiled, though its voice became almost apologetic. "And now you will forgive one more test... just to make sure you can handle them, you know."

The squares all winked out save for one broad column, the light of which rose upwards in shimmering brilliance -- then abruptly vanished in turn. In its wake, a scorpion the size of a bus lifted its pincers and its tail, clearly intending bodily harm to the pair.