| Rollercoaster: | Extremeroller (5/31/1983 A 1988) EXT (5/31/1983 A 1988) Screamroller (1976 A 1982) |
| Parco Divertimenti: | Worlds of Fun (Kansas City, Missouri, USA) |
| Classification: | Rollercoaster |
| Tipo: | Steel - Sit Down |
| Stato: | Defunct Operated da 1976 A 1988 |
| Trasferimenti: | Worlds of Fun come Extremeroller Formosa WonderWorld come Spiral |
| Modello / Modello: | Arrow Dynamics / All Models / Corkscrew |
| Capacità: | 1800 ospiti all'ora |
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| Lunghezza: | 1250' | |
| Altezza: | 70' | |
| Inversioni: | 2 | |
| Velocità: | 50 m/h | |
| Durata: | 1:10 | |
| Elementi: | 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. |