Surely, we all recall the story. It's from the short story by that grandpappy of American literature, Washington Irving. Tall, skinny fellow taunted into racing through some scary haunted place where the headless horsman is supposed to dwell. Never heard from again.
Hope I didn't give too much away.
If you want more details, read the book. Or check out the new movie version.
For a hint of where all this is leading (clue-wise), check out this Sleepy Hollow info page.