Indeed, it is one of the more tangible examples of an event horizon that is accesible here on earth. Once a child passes through the barrier, it is utterly impossible to remove him from the play center. Camps of scientists often set up shop in McDonald’s stores to observe this phenomenon, and many interesting discoveries have been made. For instance, there is the age-old question: “If matter brought into the playpen is irretrievable, does that not violate the universal conservation of information law?”

It turns out that it does not, due to what has been dubbed the Holographic McPrinciple. In a sense, all information that enters the playpen is projected flatwards onto the surface of the pen, and may even be projected on the very barrier edge of the universe, if such a thing even exists. Furthermore, Hawking won a McNobel Prize with his theory that playpens gradually lose mass through a process known as play-type radiation, where virtual particles formed at the threshhold of McDonald’s Play Pens are separated (sending the unpaired particle outside the horizon out into space, a form of energy leak that all singularities exhibit)