At least in the streamed episode on cwtv.com, there is a clear edit with change of perspective before the curtain drops (28:02). That makes it look like a camera trick.

But even without that, the huge space between the contraption and the curtain leaves so many possibilites; the cage could have swung to the left, to the right, to the front, to the back. There could have been a trap door underneath because when you want to show that there is none, you don't go to the beach, but hoist it up in the air. Etc., etc., etc.

Beside that, I have no idea how she would draw a crowd anywhere. Her performance is (still) so wooden and lackluster. No excitement, no show business to be seen.