2001 was to be the year of three new roller coasters, but only one actually opened on time: Goliath Jr., a steel kiddie coaster. The other two, Déjà Vu and X (now X²), had mechanical problems. Déjà Vu opened late in 2001 and X opened early in 2002. Déjà Vu was designed by Vekoma and is a Giant Inverted Boomerang coaster (GIB), a variant of their popular Boomerang design. It is an inverted coaster with coaches suspended beneath an overhead track that traverses an open-circuit track forward and in reverse and features two completely vertical drops and three inversions. It opened late in 2001, but suffered a lot of downtime. X was designed by Arrow Dynamics, as the world's first "fourth-dimensional" roller coaster. It is the only one in North America where riders experience going 360 degrees in their seats. Each seat lies on a separate axis from the track. This coaster managed to open briefly on January 7, 2002, only to close due to more technical problems. It reopened late in August of that year. The ride closed for a major refurbishment and re-theme in 2008 where X transformed into X².