Caught this guy in our local park in Auburn, CA.

I use this and works great, minus back pack.
https://mrjangear.com/shop/lens-carrier-system/

Looked up location of Shen Yun - a religious group

Shen Yun was founded in 2006 by Chinese expatriate adherents of Falun Gong, and is based at the Dragon Springs compound in Deerpark, New York, near where the group's leader Li Hongzhi and his followers reside.[8][9][10] Falun Gong adherents pay to rent the performance venue, promote the show, and sell tickets. After expenses are covered through ticket sales, proceeds go to Shen Yun.[1] The finances of Shen Yun and Falun Gong appear to be linked, with technically separate corporations sharing funds, executives and the same mission.[3] Li Hongzhi describes the Shen Yun performance as a means of "saving" audiences.[1]

Cormorant caught in a tree.

MR Jan Gear - https://mrjangear.com/shop/lens-carrier-system/

I have and carry a Sony A1 with the Sone 200-600, works great.

Sony A1 + FE 70-200 f2.8 GM + 1.4TX

Sony A1 + Fe 24-105mm

Ordered mine a week or so ago and now out for delivery here in CA.

https://mrjangear.com/shop/lens-carrier-system/

In surfing videos,
you will see a lot of the surfers using them.

Check this out - https://mrjangear.com/shop/lens-carrier-system/
I just recently ordered one.

I've questioned that also. It turns out to be a device that attaches to the side of the camera to support the various cables that can be attached to the camera.