"Haven't noticed much of anything."
"Well, it's keyed to give them some kind of signal."
The old man lapsed into silence. Craig wished him to continue. He desperately wanted something to distract his mind from the ghastly conditioning process.
Slowly at first, the lines formed by seams in the metal ceiling began to bend. Here it came again!
"Old man!" shouted Craig.
"Yeah, son. They've dropped it down a notch."
"Dropped ... it ... down?"
"Maybe that ain't scientific, but it's the way I always think of it."
"Can't they ... drop it down continuously?"
"They tried that a few times—once when I was aboard. You wouldn't like it, kid. You wouldn't like it at all."