Charlie and his finger-biting brother are all grown up

This might make you feel old.

Remember the 'Charlie bit my finger' video? Of course you do.

The video of a young boy and the little brother who gleefully bites his finger is the world's most popular viral video having been viewed more than 815 million times since being upoaded on May 22, 2007. It is the only non-music video in YouTube's Top Ten Most-Viewed list.