Ever since I was young, I loved watching rag doll physics in video games. Although they're not realistic, they're super enjoyable to watch.
But that's because it's a video game and we know that no one is getting seriously hurt. Watching someone get tossed around like a children's toy in real life, I'd imagine, is super, duper horrifying.
But again, it's only when we know that someone isn't getting hurt. Change the situation in which someone is getting rag-dolled, like in a car accident, or getting tossed from a rollercoaster, and you'll hold your breath and get filled with anxiety seeing that horror unfold.