You're supposed to be dead, killed, dragged out to sea by a giant squid.
7 seconds sound clip from the The Flight of Dragons movie soundboard.
You can hear this line at 00:59:13.029 in the Blu-ray version of the movie.
Quote context
[...]
- It's Aragh, friend of the family. Like a, a big brother to you.
- What's the matter, Gorbash? Did the Sand Murks steal your memory?
- Sand Murks? Were there Sand Murks here? Nonsense. They live by the sea.
- Smrgol, you could always sleep through anything.
- You're supposed to be dead, killed, dragged out to sea by a giant squid.
- Quite right. I woke up underwater.
- Awaken, brave Aragh! I am Solarius, lord of this realm, and I can restore you.
- I have a task for you. Accomplish it, and you will live again.
[...]