Climbing stairs. Not as easy as it looks. I know this from personal experience. I like how the winning approach is to favor one leg. That’s how I did it, before my hip replacement. I did NOT however slide down stairs sideways!
Gareth Branwyn is a freelancer writer and the former Editorial Director of Maker Media. He is the author or editor of a dozen books on technology, DIY, and geek culture, including the first book about the web (Mosaic Quick Tour) and the Absolute Beginner’s Guide to Building Robots. He is currently working on a best-of collection of his writing, called Borg Like Me.