Do you know these moments,
You make your normal job a the secret military base which is to shoot down enemyaircrafts.
When suddenly a Unidentified flying object appears which you can barely identify as jet.
You try to shoot it down, but the Aircraft is so maneuverable and fast to the same time that your rockets doesn't even get close to it.
But the enemy doesn't even try to hit you/your base. Just flying around, avoiding all your rockets and making fun of you by flying around and avoiding all your rockets.
You probably gonna be very pissed.