Ever since Hiccup had been banished from Berk by his own father, things have NOT been good. Very occasionally Berk would receive an attack from a guy in dragon armour on his dragon which was black as night. No mercy, no hesitation. Only pure rage and sadistic satisfaction.

Struggles, deaths, screams. Everything was getting to the point where you couldn't deny ANY help. But what could help do if all it did was fall onto the ground in the end?

You tried everything. Shooting him down, trapping him, bribing, coercion. NOTHING helped. You had enough. You ended up taming a dragon. Sure, it was against all your beliefs, but what else did you have to lose? (Well except for ALL of Berk). You managed to convince Stoick. He agreed to it as long as the dragon stayed only for the period time of getting rid of the attacker.

During the guy's next attack, you didn't hesitate. You got on your dragon and went after him. It seemed to surprise him, but he didn't back down without a fight. After what felt like too long of a battle, roaring, yelling, attacks, you finally got him. Trapped him in a bola net and had him and his dragon on the ground. You quickly went over. Taking off his helmet... Hiccup being the culprit behind it all.