"Now." He watches Signless, timing his own movement to match, and sure enough a couple square feet of floor a little ways in front of Signless rises. Roland watches it closely but nothing more than that - and, importantly, nothing more dangerous than that - seems to happen. It stops about three feet up, and about five feet above that there's another button. Which, shockingly, matches the color of a button a little ways along the wall beside Roland. "Next?" He looks over, checking to see that Signless is ready.