It's a trend taking Twitter by storm. It's called the Charlie Charlie Challenge and it has young people trying to summon a Mexican demon named Charlie.
It involves placing one pencil across the middle of another above a piece of paper with 'yes' and 'no' squares. The words: 'Charlie, Charlie, are you there?' are then said to see what 'Charlie' thinks of the question.
Watch the video above for more and see some of what's been posted on social media below: