You found a needle in your couch? That's hard to do! That's like looking for hay in a needle sack! No, it's not witchcraft. It means that while knitting, someone dropped the needle. You people are so superstitious. Stick with reality. What happens if there's a cloud at noon? Does that mean someone you know is going to die the next day at the same time?
Last night I watched an old movie where these tiny people would stick a needle in you that paralyzes you and makes you shrink. So maybe a little person was trying to stab you with the needle but missed, and stabbed the couch instead.