The much-heralded coaster was shut down most of Saturday.
The world's tallest and fastest roller coaster just opened to the public at Cedar Point Amusement Park in OH and it has already been in an accident.
The trains on the coaster "lightly bumped" into each other about 1:30 p.m. Saturday, according to a statement from a Cedar Point spokesperson.
Four people on the ride asked to see the park's first aid team, but no significant injuries were reported.
The record-breaking roller coaster will remain closed while park officials investigate the incident. "There is no further information at this time".
The 205-foot roller coaster boasts 10 world records.