Just wind hitting the body. If you've ever ridden a motorcycle in high winds (or high speeds) it's amazing how much force it exerts on your body. It typically

Just wind hitting the body. If you've ever ridden a motorcycle in high winds (or high speeds) it's amazing how much force it exerts on your body. It typically "buffets" or feels like a rapid series of someone pushing or lightly hitting your body. That's at ~70mph, I can't imagine what it's like at mach 3.