A kick in the nuts
It hurts so much you fall down and can’t move. You’re stuck there like a baby.
I got kicked in the nuts and fell down like a sack of potatoes. I couldn’t move for 10 minutes.
My friend got kicked in the nuts and just lay there like a dead man. He didn’t move for an hour.
My brother got kicked in the nuts and couldn’t get up. He was on the floor like a dog.