Even in a padded room with nothing but white walls, a locked door, and himself, he knew this as truth. All that seemed mundane and inconsequential to others was of the most dire significance to him.
How many times he blinked per minute. How many seconds it took the orderly to unlock the door for dinner. When he felt his bladder swell -- it all worked towards the preservation of reality.
He sat in the corner, wide-eyed.
If his left foot moved, the Earth explodes. If the right, than all was well.
His left toe twitched.