User blog comment:Toothless99/Things I noticed/@comment-1999513-20101202125056

Okay. Here are my answers for these questions:

1.Maybe Astrid doesn't have a helmet,or the creators didn't really want to give her one. Try to imagine Astrid with a viking helmet on, it would look pretty weird.

2.They are the best dragons to go up against, so to become a true viking they have to go up against the hardest to beat. Not to mention we haven't seen any Monstrous Nightmares since the opening.

3. They know because they have seen the attack before so they know it is the same dragon.

4. Maybe Cressida didn't think about the question, but that is actullay the best question.