to be lucky

Yesterday I read an articel about being lucky.
What you can do and what the main causes for luck are.

When you got a good mark in school, you are just 10 seconds happy. 
10 seconds

Isn't that frightening ? Just 10 seconds..
Maybe you learnt very much for this test and then just 10 seconds happiness.

I've tried it today.
I got a test back - and after 10 seconds was the euphoria gone


Maybe, that is a mental problem.
Or maybe not.