I Am I

Riddle: I'm tall and thin and balanced on a ball. I am i upside down. People use me when I get excited. Mathematicians use me even when they aren't. What Am I?

Answer: An exclamation point!

Source: https://www.riddles.com/9335

I'm tall and thin and balanced on a ball. I am i upside down. People use me when I get excited. Mathematicians use me even when they aren't. What Am I? — I am i by Cam Dennis v1.

Riddle: I'm tall and thin and balanced on a ball. I am i upside down. People use me when I get excited. Mathematicians use me even when they aren't. What Am I? Answer: An exclamation point! — by Cam Dennis v2.