When you’re orbiting the Earth on an EVA, you’re in your space suit flying at 17,500 miles per hour. You’re moving fast, but it doesn’t feel like you’re moving at all. You’re falling, really. That’s what orbiting is: You’re falling toward the Earth but you’re also moving so fast parallel to the planet that the edge of the Earth keeps rotating away from you as you fall, so you keep going round and round.