| Montagne Russe: | Extremeroller (5/31/1983 to 1988) EXT (5/31/1983 to 1988) Screamroller (1976 to 1982) |
| Parc d'Attractions: | Worlds of Fun (Kansas City, Missouri, USA) |
| Classification: | Montagne Russe |
| Type: | Acier - Sit Down |
| Statut: | Defunct Operated from 1976 to 1988 |
| Relocations: | Worlds of Fun as Extremeroller Formosa WonderWorld as Spiral |
| Make / Modèle: | Arrow Dynamics / All Models / Corkscrew |
| Capacité: | 1800 Personnes par heure |
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| Longueur: | 1250' | |
| Hauteur: | 70' | |
| Inversions: | 2 | |
| Vitesse: | 50 mph | |
| Durée: | 1:10 | |
| Elements: | Double Corkscrew | |
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| History: | For the 1983 season standup trains were put on the Screamroller's track and the ride was called the Extremeroller or E.X.T. This made the Extremeroller the first looping standup roller coaster in North America. After a few years, the original sitdown trains were reinstalled while keeping the Extremeroller/E.X.T. name. |
| Facts: | ACE (American Coaster Enthusiasts) has the standup trains in storage. |