Alastair sat forward with his elbows on his knees. "I don't think it's something you do on purpose," he suggested. "You were fine before I went to take a nap, so whatever happened, happened in the last hour or so while I was asleep." His lips twisted in a thoughtful frown. "The real question is, whether someone else did it to you on purpose, or if it's some kind of random accident or what."