NYFW: Rihanna turns Fenty x Puma runway into BMX show for Spring 2018 collection

Rihanna's Fenty x Puma Spring 2018 show was one of the more amazing -- and dangerous -- shows of New York Fashion Week.

Millennial pink mountains, death-defying BMX riders and Kaia Gerber were just some of the highlights of the New York Fashion Week show held at Manhattan's Park Avenue Armory on Sunday night.

The show opened in the most epic way possible -- four high-flying motorcyclists somersaulting over the mountains, coming scarily close to the light rigs mounted on the ceiling. After the dramatic opening, the presentation began as a parade of RiRi's futuristic-yet-wearable athleisure pieces made its way down the runway.

"This collection is a mix between two worlds: motocross and surf. It was a challenge to bring them together but it ended up being the perfect combination," Rihanna said of her Spring 2018 line.

The BMX inspirations were obvious on the runway, with biker suits in hues of cobalt blue, lime green and orange alongside wide-legged pants, off-the-shoulder spandex, oversized jackets, clunky creepers and high-heeled flip flops.

Rihanna's show was filled with one surprise after another. The collection also introduced swimwear for the first time with curve-hugging monokinis and flattering bikinis, perfect for streetwear and pool parties. The neon hits, wet-looked gel prints, wetsuit pullers and rubber patch details throughout the collection are a nod to throwback surf and extreme water sport culture.

Of course, the show ended with a bang. Rihanna appeared out of nowhere aboard a back of BMX bike to do a victory lap of the arena. She looked flawless wearing a khaki corset-sleeve top, lime green track pants and thigh-high leather boots.

The star-studded crowd included Whoopi Goldberg, rapper A$AP Ferg and Selah Marley, as well as family members including RiRi's mother Monica Fenty, whom the fashion line is named after.

Check out the slideshow above for the complete Fenty x Puma Spring 2018 collection.