Stu­dent #1: How could you throw a ball 520 me­ters? That’s like half a mile!
Stu­dent #2 (from back of room): You know what else is half a mile?
(stu­dents all laugh)
Teacher: What? How come every­one got it ex­cept for me?

–Bronx HS of Sci­ence

Over­heard by: Lil­lian