Instructable’s annual DIY contest is going on now, and it may give you some last minute ideas for Halloween ghoulies, gadgets, and costumes. We especially liked this low-cost Lightning Globe, created by member NK5. You will need a bulb that is gas-filled, a black painted aluminum screen to attract electricity, a high voltage power source such as an old monitor, and a black plastic pot. NK5 claims that the entire project will cost about $5.00 but cautions that you had better know what you are doing to avoid frying yourself during the construction process. Check out the video for more details.