empty on Instagram: "The post shares a 12-second video tutorial on the "hospital corner" (or mitered edge) technique for tucking a fitted sheet, pulling it taut over the mattress corners for a wrinkle-free, professional look used in hotels and medical settings. Posted by an art appreciation account, it playfully elevates bed-making as an expert skill, echoing Admiral William McRaven's 2014 TED talk urging it as a simple daily win that builds discipline and ties to studies showing bed-makers repo