Video: These days all you need to recreate Hollywood-calibre visual effects is a fast PC and some expensive 3D software. But if you want to try your hand at recreating old-school special effects, find yourself a 3D printer, make a miniature version of Ghostbusters' Stay Puft Marshmallow Man and go to town with a blowtorch. Watching hours and hours of a 3D printer doing its thing melt away in mere minutes is incredibly satisfying. The only downside? Instead of the wondrous smell of toasted marshmallows, melting this 3D-printed creation only creates toxic plastic fumes.