Figured out how to do it in middle school at a friend's birthday party. I can do a lot of tongue tricks, folding my tongue in half both ways, making a bowl, making a 3 leaf clover, and unwrapping a starburst but the last one involes a lot of teeth.
Yes and I know someone who can! My friend's mother would take us out to a bar on "Fried Chicken Night" when I was just a little girl and they would bring us a bowl of cherries and we were not allowed to talk until we finished tying all of the stems into knots with our tongues OR until we got our food! lol