My mother also likes the duo, watches Bullshit regularly, has seen other stuff, listened to his radio show on occasion, etc.
So, I dug up a clip from last week's premiere, played it, we watched it, and my mother just completely blew my mind.
"I never knew Penn & Teller were magicians!"
I actually stared at her for about thirty seconds, and all thought in my brain stopped, as my eyes grew ever wider, until I could give an anime character's occular organs a run for their money.
My mouth moved, but no sound escaped that formed actual words, only a dull noise from the back of my throat, until I couldn't take it anymore and grabbed my temples before my head exploded.