When your best friend makes up her own language, just so that she can have comebacks to your random elvish.
When you're in line for a roller coaster, and it's a really long line, and you start talking to the in front of you. Somehow, you manage to get the conversation around to LotR, and educate her very thoroughly about why the movies are not the best source for LotR knowledge. You then explain to her exactly why HP is not a wizard...
You no longer get strange looks from your best friend when you say random things involving LotR. (It's best when it's a quote from the book only, because she doesn't know those yet.)
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