Huh?

So I'm currently on hold with XM Radio support. (By the way, GOD I hate these automated machines that they try to make sound like people. It's just stupid when an automated machine says things like "O.K.")

Also I'm currently on hold and you would think there would be some music playing since it's a radio station.

Anyway, I digress. The automated attendant at one point says something that really doesn't make any sense.

"While on hold you may HEAR moments of SILENCE"

Huh??