It's an act that draws in a good crowd and leaves him with lots of attention afterwards. He even pulls ever punch, every detail, and every second to make it seem like a reality. As a magician he has other magics such as his 'sky walk' down to the stage when he starts.

But don't worry, Ichigo. That sawing in half will happen sooner than later given how Joker has volunteered. He'll at least see him playing with the idea later.

When he emerges from the tank after dismissing his tentacles, after prolong soothing, calming, and getting them to go away without Strange's help, he'll sit there on top of the tank looking more wet than anything else. A cheerful grin plasters on his face at Ichigo's presence and the cookies, "How thoughtful. Don't mind if I do."