Different take:

Celestia: I have called you all here, the most annoying and aggravating ponies in all of Equestria for one task and one task only...you are to make me angry.

Blank stares.

Celestia: Every pony tries not to make me angry, but if control is not exercised regularly for anger management, even small accidental slights and mistake could lead to a temper tantrum...and as steward and Shepard of the sun...the results could be disastrous!So think this as your duty as a loyal citizens of Equestria.

Blank stares.

Celestia: You're making me angry....