After the storm that set the stables on fire, you went to free the dragons. But when you were about to leave, lightning struck in front of you, leaving you blind, not knowing if it could be permanent

The group split up to look for their dragons, which had flown away for fear of the storm... Snotlout, the Twins and Fishlegs left alone while you and Hiccup went to look for your dragon, Storm, riding Toothless

"Listen, you and I have shared everything together. Don't you think we can handle it?" He slowly takes your hand "you have me, no matter what. I'm with you" he whispered. And even though you couldn't see him, he was about to kiss you.