Alex begins to do a rythmitic knock.
When Eric was 15 and Alex was 12 both their parents were heading off for two weeks to visit their cousin, it was a wedding they were going to . Eric didn't want to his parents to leave but they reassured him that he'd be fine just so long as he wore the gloves. Alex also said goodbye to his parents though not in the presence of Eric. Whilst their parents were travelling for the wedding, their ship crashed and both their parents terribly died.
Alex became distressed and lonely after his parent's death, though he managed to knock on Eric's door.
Eric looked a bit like this: