[Scene cuts to Arena, in a middle of another training session. The arena fills with a greenish fog, obscuring the dragon.]

Gobber: Today is about teamwork. Now, a wet dragon head can't light its fire. The Hideous Zippleback is extra tricky. One head breathes gas, the other head lights it. Your job is to know which is which.

Fishlegs: Razor sharp, serrated teeth that inject venom for pre-digestion. Prefers ambush attack, by crushing its victims--

Hiccup: [On edge] Will you please stop that?!

Snotlout: If that dragon shows either of his faces, I'm gonna-- there!

[Snotlout and Tuffnut drench Astrid and Ruffnut, thinking they were the Zippleback.]

Ruffnut: Hey! It's us, idiots!

Tuffnut: Your butts are getting bigger. We thought you were a dragon.

Snotlout: Not that there's anything wrong with a dragon-esque figure-- Ow!

Damian: *Thoughts* You Deserved That, You No-Good Muttonhead.

[Astrid punches Snotlout in the face, and Ruffnut throws her bucket at Tuffnut, who is then dragged into the wall of smoke.]

Astrid: Wait. [A tail knocks them off their feet]

Tuffnut: (running out of the mist, screaming) OH, I'M HURT! I AM VERY MUCH HURT!

Fishlegs: Chances of survival are dwindling into single digits now. [One of the Zippleback heads emerges from the mist. Fishlegs throws water at its face, and it angrily spews out some green gas.]

Fishlegs (cont.): Oh. Wrong head.

[The head sprays a large stream of green gas, and Fishlegs runs off screaming. The head turns its attention to Hiccup and the other head comes into view, spitting electrical sparks]

Gobber: Fishlegs! Now, Hiccup!

[Hiccup throws the bucket of water at the spark-spitting head, but misses]

Hiccup: Oh, come on!

[The Zippleback pounces, both heads snarling at Hiccup]

Gobber: Hiccup!

[Hiccup reverses the Hideous Zippleback with a hidden eel.]

Hiccup: Back! Back! Back! BACK! Now, don't you make me tell you again! Yes, that's right! Back into your cage. Now think about what you've done.

[Hiccup shuts the door of the enclosure. He throws the eel inside, and the Zippleback cowers in terror. The teens and Gobber are shocked, and Fishlegs drops his bucket.]

Hiccup (cont.): Okay! So, are we done? Because I've got some things I need to, uh... Yep. I'll... see-see you tomorrow!

Damian: *Thoughts* Just What Is He Up To? I'm Going To Find Out,If It's The Last Thing I Do!!!!!!!!!