This is not a wise experiment. Ponder Stibbons knows this is not a wise experiment, but he can't bring himself to care. It has the potential to break down the walls between dimensions and let him look into other universes. Of course, it also has the potential to kill him horribly, possibly while taking out half of the city, but he's choosing to ignore that.
The experiment is ready. He pokes the button.
And then, he is somewhere else.