[Hiccup is back at the cove, with a basket of fish and the prosthetic fin.]

Hiccup: Hey, Toothless. I brought breakfast. I hope you're hungry. Okay, that's disgusting. Uh... we've got some salmon, some nice Icelandic cod, and a whole smoked eel.

[Toothless roars in fear at the sight of the eel.]

Hiccup (cont.): No, no, no, no! It's okay. (throws the eel aside) Yeah, I don't really like eel much either.

[Toothless starts to eat the fish. While he's distracted, Hiccup sneaks toward his tail.]

Hiccup (cont.): Okay. That's it. That's it, just stick with good stuff. And don't you mind me. I'll just be back here... minding my own business.

[Hiccup tries to attach the new tail-fin.]

Hiccup (cont.): It's okay. Okay... okay... There. That's not too bad. It works.

[Toothless stops eating and perks up, seemingly realizing he might be able to fly again]

[Toothless takes off with Hiccup literally on his tail. They head towards a rock wall]

Hiccup (cont.): Whoa! No! No! No!

[Hiccup quickly adjusts the tail fin and they dodge the wall]

Hiccup (cont.)

OH, MY-- IT'S WORKING! YES! YES, I DID IT!

[Toothless realizes Hiccup is on his tail and throws him off. Unable to steer the fin on his own, he then crashes into the lake.]

Hiccup: AAAAAGGGGHHHHH! Yeah!