A rescue was averted when the park got the coaster moving again.
The Stinger, an inverted coaster that flips riders six times, is new to Dorney Park this season.
Dorney got the ride from Great America Park in California, where 24 riders got stuck on the ride (then known as Invertigo) for hours in 2009 because of a mechanical failure, according to a published report. No one was injured.
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No one was injured in Wednesday's incident at Dorney, but medical personnel were called to evaluate the riders as a precaution.
The coaster got stuck "on the lift tail" (as riders were being lifted up the track, about 138 feet high), not during any flips or turns, said Dorney spokeswoman Carrie Basta.
She said everyone was able to get off the coaster when the park got it moving again and the ride was returned to the station.
The cause of the malfunction is being investigated. But Basta said what happened was "not even in the same ballpark" as what had happened at Great America park.
"These coasters are machines," she said, "and just like your car, an unexpected thing is going to happen once in awhile."
On the Stinger, riders sit face-to-face as they go along 1,014 feet of overhead track, forward and backward, at speeds up to 55 mph.
When the new ride was first announced for Dorney, park officials said it had undergone an overhaul, including ungraded control systems and newly installed mechanical and drive systems.