An investigation is under way after Bonfire Night revellers were left hanging upside down for more than an hour when a fairground ride jammed.
Eighteen carnival-goers aged between eight and 27 were suspended 20ft off the ground when the attraction at Strathclyde Country Park in Motherwell became stuck.
Fire crews used ladders to rescue 12 males and six females from the Move It ride.
A 27-year-old man was taken to hospital suffering from shock.
The ride became stuck at around 8.45pm on Sunday. Rescue teams managed to bring passengers upright before freeing them one by one by around 11.30pm.
Ronnie Nesbit, whose two daughters were trapped on the ride, told BBC Radio Scotland: "I'm a bit upset about the whole thing.
"What's more concerning is the lack of information we kept getting.
"There should have been more information."
A spokesman for the Health and Safety Executive confirmed that an investigation was under way. "One of our inspectors was at the site last night and will be returning again today," he said.
"We'll be looking at the cause of the accident and the subsequent emergency response."
The spokesman said that when rides become jammed they can usually be restarted by pressing a reset button.
"That doesn't appear to have happened," he added.
It is understood that the Move It ride is part of a carnival based temporarily at Strathclyde Country Park.