Al caer, me rasmillé la rodilla y tuve que curarla con un poco de agua y una venda.
When I fell, I scraped my knee and had to treat it with some water and a bandage.
Si no tienes cuidado, podrías rasmillarte al caer en esa roca afilada.
If you're not careful, you might scrape yourself when falling on that sharp rock.