Ryan didn't even have time to see the person coming clearly, so he instinctively shrank to the side - the movement was not big, but he just happened to let a fat noble apprentice rush towards him like a small battering ram.
The tin plate in his hand had a slightly deformed edge. As he moved sideways, the edge "pricked" and scraped the lower back of an apprentice who was queuing up for soup in front of him.