Sir Ian McKellen is one of the finest Englishmen working in Hollywood. But his Gandalf persona, with that sonorous delivery, is just iconic. You could watch him all day it's so perfect. So, the schoolchildren at the Chew Valley School in Southwest England were lucky enough to have him pass by the other day. And he gave them some perfect advice: "In your preparation for your examinations, if you don't do your revision properly, you know what will happen? You shall not pass!"

If only math tests were Balrogs. I think we all could have used that in grade school.