Caught at the bus stop without your smartphone or tablet? Whatever are you to do? (An apposite aside: do people still twiddle their thumbs or has thumb typing dexterity displaced the neural connectivity previously forged through such antique pastimes??)
An Italian conceptual artist named Fra.Biancoshock has installed a solution in Milan: free sheets of bubble wrap sized according to your estimated wait time. Read all about it in this recent NPR science column by Robert Krulwich.