Mountaineering with the help of xenon gas.. pogo-stick, backflip. Female Mountain Bikers Backflip Their Way to Equality. women shared equally in adrenaline and prizes.

They Inhaled a Gas and Scaled Everest in Days. Is It the Future of Mountaineering?

A group of British men went from London to the summit of Everest and back in less than a week with the help of xenon gas. Mountaineers — and Nepal — weren’t pleased.

他們吸入氣體，數日內登頂珠穆朗瑪峰。這會是登山運動的未來嗎？

一群英國男子借助氙氣，在不到一周的時間內從倫敦登頂珠穆朗瑪峰並返回。登山者——以及尼泊爾——對此並不滿意。

Female Mountain Bikers Backflip Their Way to Equality

In the past, only men were invited to the scariest and most lucrative event in mountain biking. This year, women shared equally in adrenaline and prizes.

Boston Dynamics' Atlas robot can now jump and do backflips. Incredible! https://spectrum.ieee.org/…/video-friday-backflipping-atlas…

Pogo as an Extreme Sport

Thanks to new designs, pogo-stick riders can do backflips, jump several feet in the air. The best compete in Pogopalooza.
Read original story in The Wall Street Journal | Friday, 28 Aug 2009

Key facts. Adrenaline is a hormone that your body naturally releases from your adrenal gland. Adrenaline causes changes in your body that help you to act in a sudden stressful situation — also known as a 'fight or flight response'.

Adrenaline - Healthdirect

Wikipedia article "Pogo stick".
n. - 彈簧單高蹺, 該遊戲的工具
v. intr. - 玩彈簧單高蹺
idioms:

• pogo stick 一種跳躍用高蹺杖, 彈簧單高蹺

後滾翻
backflip
intr.v., -flipped, -flip·ping, -flips.
To perform a backward somersault, especially in the air.
n.
A backward somersault.