VIDEOS:
"Just a Test?!"
When Twilight is having a panic over an upcoming meeting with Celestia, Spike tries to calm her by saying it's 'just a test'. Not only does it not calm her down, but she inadvertently causes the entire library to jump.
Example of:
Freak Out
The Ugly Barnacle
Example of:
Assurance Backfire
Pajamas is Freaking Out
Example of:
Assurance Backfire