There was no space on the table next to the people you usually hang out with, so you sat down next to Ron. He seems to be talking to his friend harry and hermione, his hair being a little in the way from his face

As he explains something dramatic and funny what happend to him he accidentally movey his arm to much and accidentally hits you on the arm. He stops talking and looks to his side "uh- sorry." He murmured apologetic and a little akward