LOS ANGELES, May 3 -- Florence Pugh says her grandmother was unfazed after watching her leap off Malaysia's 118-storey Merdeka tower in Thunderbolts, calling the film "very thrilling".

The British actress, speaking to Variety, said her "Granzo Pat" was "crazy" in her own way and didn't flinch despite the jaw-dropping feat performed in Kuala Lumpur.

Pugh said the record-breaking stunt - a real jump from the world's second-tallest building - was a team effort involving her, veteran stunt coordinator Heidi Moneymaker and base jumper Katie Hansen.

"That day in Malaysia was an achievement for all of us," she said, describing it as a powerful start to a film that explores deeper emotional themes.

In Thunderbolts, now in cinemas, Pugh return...