Hiccup was in his hut with Toothless, using the dragon eye and figuring out how to use it when Astrid shows up, the dragon eye projection projecting on Astrid

Hiccup: "Oh! Astrid class. Heh heh." Hiccup says with a chuckle

Astrid: "Hiccup, we have a problem, a huge problem.

Hiccup: "Dagur?"

Astrid: "Worse."

Hiccup: "What could possibly be worse than Dagur?"

Just that second Gustav and Fanghook land on top of Astrid accidentaly

Gustav: "Gustav!"

Hiccup: "Gustav?!"

Astrid: "Gustav.

Hiccup: "Gustav, what are you doing here? I--I mean what do we owe the pleasure of this visit?" Hiccup says as Fanghook smacks Toothless' snout with his tail

Snotlout, {{user}}, Fishlegs and the twins rush in

Snotlout: "Hiccup! Did you hear Gustav is..." he cuts himself off when he sees Gustav in front of him "Standing right beside you. Perfect." Snotlout says sarcastically

Tuffnut: "You're looking a little different there, Guster."

Gustav: "Yeah, I'm growing a beard." he boasts one singular hair on his chin

Tuffnut: "Really? Let me see."

Gustav points to the singualr hair on his chin

Tuffnut: "Ha! Even Ruffnut has more hair on her chinny-chin-chin than that!" Tuffnut says pulling the hair out

Gustav: "Oww!" he says backing up the the chest Hiccup was sitting on "Hey, what's that thing?" Gustav says picking up the dragon eye and looking directly in the part that emits light "Oh! Whoa! You see these spot? Some sort of sun sword?" he says, disoriented white spots in his vision

Hiccup: "I'll take that!" Hiccup says catching the dragon eye "No, Gustav, it's not a sun sword."

Fishlegs: "It's the dragon eye, and it's very old and very fragile."

Gustav: "Whoa, these spots, they're not going away." he says clumsily running into one of Toothless' tail fins on Hiccup's wall

Fishlegs: "It isn't something to just be touched."

Gustav: "Relax, Fishlegs, I know what I'm doing." *he says clumsily sunning into the wall and knocking off the rest of Toothles' tail fins."

Toothless' growls in annoyance as Fanghook places one of the pins on his head

Snotlout: "Gustav, Gustav, over here." he says putting a hand on Gustav's head when he goes over to himself "Uh, when are you leaving?"

Gustav: "That's funny, Snotlout, but I'm not leaving. I'm moving here."

Snotlout and the twins gasp in shock and horror (probably at the thought that they have to deal with him being annoying)

Tuffnut: "Ha, ha! Yeah, yeah you are." he says sarcastically while laughing

Tuffnut hits Ruffnut's arm while laughing

Tuffnut: "Imagine... He would never..." he says while laughing hysterically, practically struggling to talk the suddenly straightening up "Wait, is he serious? I'll get the stake and firewood."

Hiccup: "Oh, hold on, hold on. No one is burning anyone at the stake."

Ruffnut: "Hiccups right.. Let's just throw him offthe cliff."

Hiccup: "Guys, I'm sure there's a simple explanation." Hiccup turns to the dizzy Gustav "Please tell me there's a simple explanation, Gustav.

Gustav: "Yeah, very simple. By the way, do not look right into that sun sword thing." he says rubbing his eye "Ha ha ha! Whoo! Anyway, you said I when was ready, I could join the dragon riders." he gestures to himself "Well, I'm ready and I'm here to join. Where's my hut?"

After the training misshap with Astrid, Gustav filling up the twin's boar pit and Fanghook burning Fishlegs' topiaries in his 'meditation sactuary', {{user}} and Snotlout are stuck with Gustav