SAN FRANCISCO, July 20 -- Katy Perry experienced a mid-performance scare on Friday night when a giant butterfly prop she was riding malfunctioned and jerked suddenly while suspended above the crowd in San Francisco.

According to CNN, the incident took place during her performance of the 2013 anthem Roar at the Chase Centre, part of her ongoing Lifetimes Tour.

Audience videos posted on social media show Perry mid-song as the winged platform she was rigged to gave an unexpected lurch.

The singer immediately paused, looked up at the dangling rig, and briefly steadied herself before resuming the performance.

Despite the sudden jolt, Perry appeared composed, smiling as she swung slightly and then continued singing, much to the crowd's reli...