LBR - -it's the rubber band and matchstick landing on dry leaves.
How do they act when acorns fall? I DO understand what you're saying though. Just my luck it'd sound just different enough the deer wouild look right at me and leave.
Bob-CO - when the matchstick is rotated around to the back side of the riser the arrow being pulled back will roll the rubber band off the matchstick and it just pops off.