Can only make unintentional wishes

With a flash, the stone disappeared replaced by a small bracelet on Jon's wrist. It was actually magic!? "I wish I had a hundred dollars" Nothing "I wish I had a girlfriend" Nothing "I wish that tree branch was blue." Still nothing. What was going on!? Jon took a quick look around thankful no one noticed what happened. Absentmindedly he wondered out loud what had just happened. "Huh, I wish I knew what just happened." The bracelet flashed and Jon's eyes widened. The bracelet would only grant wishes that were not made intentionally. Quickly gathering the implications of this he grabbed the bracelet and tried to pull it off but would not budge. He was stuck with this for now.