“This can never happen again – we are in shock and all I can think of is, ‘What if my kids were on the ride’.”
Danter Attractions, which runs the ride, said it was “fully co-operating with the authorities” as the crash was being investigated.
A spokesperson said: “Our thoughts are with the individuals and families affected.
“At this time we are unable to provide any additional comment.”
Lilly Nitsch, 18, from Leamington Spa, was at the scene and told the she was “pretty shocked” by the incident.
“That’s one of my favourite rides growing up,” she said.
“It makes me think of of the times you’ve been on rides like that. It makes me feel lucky.”