The audio came from the installation of monster hunter freedom unite screen. Later on making touhou parody staring Chen sliding in a box. Which inspired alfa995 to make ponified version, In their description it quoted "Ponified version of this:

• 【Touhou】 Chen Sliding ...

For those of you who don't know...this is actually a meme! http://tinyurl.com/3o8nvev "

(Source)
https://youtu.be/34_tgUM1Hkw?si=X8QP6PxdnfoMO5Gy
https://youtu.be/rnUkZk84WfQ?si=T1oEyeG00A4zNVpb or http://www.nicovideo.jp/watch/sm7696104
https://youtu.be/jKFaqMzIoVo?si=MCc8we-iIAPVFjtM