OAKLAND — A computer glitch left 80 people stranded in gondolas at the Oakland Zoo on Friday, an official said.

The system crashed about 1:45 p.m. and affected a total of 24 gondolas, 16 of which were occupied, said zoo spokeswoman Erin Dogan Harrison. It took more than 30 minutes to reboot the system, but the gondolas were moving again by about 2:25 p.m.

Harrison said the Oakland Fire Department was called to the scene in case the reboot didn’t work.

Riders took the breakdown in stride for the most part, but a few were upset, Harrison said. The zoo gave every rider a free pass.

“They were never in any danger,” she said.

The electric eight-person gondolas were custom made by Austrian-Swiss company Doppelmayr for the zoo’s $70 million California Trail expansion. Harrison said Friday was the first time the 13-month-old attraction has been brought down by a computer glitch.

The zoo has reached out to Doppelmayr to find out what happened and to keep it from happening again, Harrison said.

And here's the unexpected exhibit at the #Oakland Zoo today. Humans stuck in gondola cages, for at least the past hour. They have a great view, though. 😂😫 pic.twitter.com/M5yz6N8oNg — Becca Gomez Farrell (@thegourmez) July 13, 2018