So, how exactly does this work?

It’s not the first bottle-related challenge to go viral, but this time participants have to do more than just flip the bottle.

The challenge is how to unscrew the cap with a roundhouse kick without knocking the bottle over. The trick, as you might have guessed, is to loosen the cap beforehand and have someone off-camera hold the bottle steady. Many people have posted their videos in slow motion, making the feat seem that much more impressive.

Whose idea was it?

The bottle-cap-kicking videos first circulated widely in mixed martial arts circles, but the origin of the challenge is unclear.

It may have started with Farabi Davletchin, a Kazakh taekwondo champion, and some good-natured goading.

On June 25, Mr. Davletchin posted a cap-kicking video on Instagram with the hashtag #farakickschallenge. He called out several celebrities to accept his challenge, including Mr. Statham, Conor McGregor, Jean-Claude Van Damme and Jackie Chan.

His hashtag didn’t catch on, but the challenge did.

How popular is this?

Errolson Hugh, a fashion designer, posted his own video with the hashtag #bottlecapchallenge. Within a week, more than a million people had watched it. Mr. Hugh then challenged Max Holloway, an Ultimate Fighting Championship featherweight champion.

Mr. Holloway soon shared his own video, which racked up more than two million views in four days. He also challenged his friend John Mayer, the famous musician.