If you’re looking to add a little excitement to your haunt, or just want to give the trick or treaters a quick startle before sugaring them up for the season, then a rumble bridge might be just what you need.  It’s a pretty simple project to build and the guys over at CreepyCreations have created a great video detailing how its done.   How to Build A Rumble Bridge   The completed Rumble Bridge:   Items needed to complete this inlclude: (1) – 3/4″ sheet of plywood (4) – 2×2 wood, 36″ long (4) – 2×2 wood, 30″ long (1) – 2×2 wood, 48″ long (2) – 2×4 wood, 43″ long (4) – 2×4 wood, 25″ long (4) – 4×4 wood, 6 to 8″ long (2) – 4″ diameter rubber balls (1) – clamp (1) – bracket (1) – 2 oz fishing weight (8) – 7″ bolts with nuts & washer – 1/2″ diamter Assorted screws, nuts & bolts for weight Hot glue Metal strapping High speed motor   Shop These Materials on Amazon 12V Wiper Motor 2.5" Shaft 110 Degree (prop building) PWM DC Motor Speed Controller 9-70V 35A 45Kg High-Torque Waterproof Digital Servo Motor Affiliate Disclosure: HauntersList.com is a participant in the Amazon Services LLC Associates Program. As an Amazon Associate we earn from qualifying purchases at no extra cost to...