My perception of the facts...

Me: Guess what?
Sis: ...
Me: Guess what?
Sis: (annoyed) What!
Me: (proudly) I'm doing NaNoWriMo.
Sis: (yawns) Big whoop. So am I.
Me: You are? ... So, when did you start?
Sis: Thirty minutes ago.
Me: Ha! You'll never make it. It took me twenty days to get 25,000 words.
Sis: Whatever. I already have 2,000.
Me: D'oh!

• My sister is participating.
• She wrote 2,000 words in 30 minutes.
• Her "What!" can stop a conversation dead in its tracks.
• Sadly, I really say "D'oh!"

Sibling rivalry has raised the stakes. For all I know, she may be done tomorrow.