Aykroyd tasked his friend, referred to as the Viking, with designing the Marshmallow Man, asking for a combination of the Michelin Man and the Pillsbury Doughboy in a sailor hat. The Marshmallow Man was fabricated and portrayed by actor and special effects artist Bill Bryan, who modeled his walk on Godzilla. There were eighteen foam suits, each costing between $25,000 and $30,000; seventeen of them, worn by stuntman Tommy Cesar, were burned as part of filming. Bryan had to use a separate air supply due to the foam's toxicity. There were three different heads for the suit, built from foam and fiberglass, with different expressions and movements controlled by cable mechanisms. The costume was filmed against scale models to finish the effect. The effects team were able to find only one model of a police car at the correct scale. They bought several and modified them to represent different vehicles. The water from a burst hydrant hit by a remote-controlled car was actually sand as the water did not scale down. The "marshmallow" raining down on the crowd after it is destroyed was shaving cream. After seeing the intended of shaving cream to be used, Atherton insisted on testing it. The weight knocked a stuntman down, and they ended up using only . The cream acted as a skin irritant after hours of filming, giving some of the cast rashes.