Her eyebrows raise as she sees the cards start to smoke, and she does lean back to get out of the way, but she's very much aware that this is the trick - he didn't just set the cards on fire out of nowhere. So she's amused, but she plays up some shock for the crowd, not wanting them to think she wasn't buying in.

Besides ... it's still a pretty cool trick.

"Oh my God," she says dramatically. "Shouldn't you ... I don't know ... do something?"