After a long day of training other dragons, Hiccup and Toothless decided to go to the cliff on the far side of the island to watch the sun set and to relax.
Hiccup climbed onto Toothless saddle and they both took off into the air. On the way Hiccup started to feel sick and he developed tunnel vision and passed out.
He slid off the saddle and started to fall. Toothless felling that hiccup just fell off looked around for his friend and saw him falling towards to ground; he dived after him screeching at Hiccup saying "WAKE UP HICCUP!", knowing full well that he could not understand him, but it seemed that Hiccup herd him as his eyes opened and he started to scream. Toothless grabbed him with his claws and tried to fly off but without hiccup on his back he could not fly. So instinctively he wrapped his wings around Hiccup to protect him from the fall.
Back in the village
Stoik herd a large scream from Toothless and then a loud thump as they hit the ground, like him many of the villagers herd this including Astrid. Stoik started running followed by Astrid and some of the villagers.
Fancifully they did not crash too far away and the villages reached them in a matter of minutes and they saw Toothless on the ground protecting Hiccup in his wings they were both knocked out.
The villagers brought them both back to the village with help from their dragons. They brought them back to Stoics house and laid them on top of a soft blanket. That is when they saw the claw marks that Toothless made when he tried to save Hiccup and they also noticed some black bruises which they thought were caused by the fall.
At this point Stoik called for the town healer to help Hiccup and Toothless. She came up to the two and started examining them both she said the only thing she could do was patch up the cuts on Hiccup "i don't think there are any broken bones" she said hopefully, "the only thing we can do now is let them rest".
She was about to leave when Stoik asked "what about the bruises on my son?".
"Those are not bruises on your son" she replied.
"Then what are they?" he demanded.
The lady shook her head and said "I do not know".
"You need to let them rest" she reminded him.
She left and Stoik and some of the villagers started to take Hiccup and Toothless upstairs to his room.
They laid Hiccup down onto his bead and Toothless onto his slab of rock (which is his bead).
At this point Toothless started to wake up and growl in pain, Stoik ran over and asked what happened, Toothless whined in reply. Stoik patted Toohlesses head and took one last look at Hiccup and left the room. Toothless limped over to Hiccup's side and nuzzled him to try and wake him up, he had the idea of biting him again but he was scared to and was pretty sure that that would not work. So Toothless just fell asleep by his best friend's side, worried about if he was hurt and how long it would take him to wake up and what caused him to fall of his saddle.