On one hand, Hal agreed with Hiccup. On the other hand, sarcasm didn't seem likely to get the point across.

As usual, there was a rational answer and a Hal answer to the question of what would, and Hal didn't think twice before taking the plunge.

"You think I don't know fear?"

Words were one thing. Action - proof that he knew what he was talking about - was another. Hal held up his right hand, and in a smooth, deliberate motion, pulled the green ring off and let go of it. Because surely, after his history...

He was right. It didn't take a moment before a yellow ring rocketed in to take its place.

[HAL JORDAN, OF EARTH. YOU HAVE THE ABILITY TO INSTILL GREAT FEAR. WELCOME TO THE SINESTRO CORPS.]

The green of his uniform faded to yellow. Yellow energy swirled, briefly taking the form of a hideous, Giger-esque space bug that curled around him protectively, almost possessively, before the construct dispersed again.

"I was Parallax's host. Literal living fear. I've been down this road already, so believe me, I know fear. It's powerful. But it's not all-powerful."