Join the ghouls from the Department of Physics and Astronomy for spooky physics demos. Bring the kids and learn about waves, electricity, magnetism and more. Expect a hair-raising experience. One of the experiments involves a Van der Graff generator, a metal globe that shoots enough electricity through those who touch it to make their hair stand up. Harmless, of course. Other ‘nefarious' experiments may involve a bed of nails, fire and using an electromagnetic field to levitate items. Also, learn how to freeze ice cream with liquid nitrogen, at minus 300 degrees. Other fun includes food and a Halloween costume contest for youngsters.