The film's signature climax was staged on a one-way bridge over the Colorado River near Needles, California, where Rubber Duck's truck plunges from the span after a confrontation with Sheriff Wallace, Texas police, and National Guard troops. The production used a tanker truck for the spectacular explosion and collapse into the river, an operation dangerous enough to require the presence of the Needles City Fire Department for fire protection. The scene was not a studio miniature or a harmless optical illusion: a full-size truck, a working bridge, heavy pyrotechnics, and a major waterway were combined for the shot.
The location itself was soon rendered obsolete when a new bridge was built to connect the Arizona and California sides of the river, and the old span was removed afterward. In the finished film, the stunt is presented as Rubber Duck's apparent death, although the character secretly swims away and later appears at his own public funeral. The production survived the shoot without the fictional catastrophe becoming a real fatality, but the scene remains one of Convoy's most hazardous and mechanically elaborate pieces of location filmmaking.
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