From a height of about 3 feet. This is my third day using a specced out 15" that I've literally waited years to buy. So I have a laptop backpack that has both a top and side zipper for quick removal. Was leaving a cafe with the Mac in my bag and forgot the side was unzipped. As I turned and stood up I heard a loudass metallic clatter behind me -- I thought I had knocked over a sign or something. Everyone in the cafe turned to stare -- I was genuinely confused until a waiter meekly told me "Sorry sir, I think you dropped your computer." F%%%. The laptop had launched out of my backpack with quite some torque and landed hard on the right corner before coming to a rest upside down. I opened the lid... and yes, it turned on. There's now a nice fat bite out of the chassis and a few scuffs on the lid. The body seams near the impact have spread oh-so-sightly, and the location of impact has deformed a few mm meaning the lid no longer closes perfectly flush. But other than that everything seems fine. I swear this thing is like a slab of granite. Very well-built. But honestly. I don't deserve nice things.