I can go for hours at least. Not reading, not on your phone, not talking to anyone, just with your thoughts. Just with my thoughts. I think that's one of the key things about reverie, that you want to be alone with your thoughts and so he designed this experiment where undergraduates are in a room. There's no cell phone. You're just there with your own thoughts. And it's so torturous for them for even just a matter of minutes that a good number of them would rather be shocked electrically than to do nothing at all.