Hello and welcome to Aperture Science’s Ministry of Silly Walks. When one is passing between dimensions via projected portals it is customary to do so while walking in a very silly manner, so as not to offend those who reside in the Python dimension. If you should meet a man named Monty on your trip through the aperture just remember- his house looks like a flying circus because he doesn’t get very many visitors… Take a walk on the wacky side with this Ministry of Silly Portal t-shirt and let your sci-fi dreams become very, very silly indeed!