The famed horror writer who gave you "Goosebumps" as a kid, R.L. Stine, took to Twitter Tuesday to write a brand new short story just in time for Halloween… 140 characters at a time.

Before you read on, however, beware that you may never eat an egg salad sandwich again.

I am going to try to write a story live on Twitter now. The story is called "What's In My Sandwich?"...

— R.L. Stine (@RL_Stine) October 29, 2014

People call me a loser, but that's going to change. I was in a little diner downtown and I ordered an egg salad sandwich…

— R.L. Stine (@RL_Stine) October 29, 2014

..I was about to bite down on it when I noticed something moving in the egg salad. Was I imagining it? No…

— R.L. Stine (@RL_Stine) October 29, 2014

..I saw a hairy, three-fingered claw push a clump of egg out of the way. I saw two round black eyes. A fur-covered face…

— R.L. Stine (@RL_Stine) October 29, 2014

Read the rest of the story on R.L. Stine's twitter page.