a flexible rock

https://packaged-media.redd.it/vld85g1uuh1c1/pb/m2-res_638p.mp4?m=DASHPlaylist.mpd&c=wh_ben_en&var=sgpssan&v=1&e=1781762400&s=4994a2c0108b861aad0a12f4ad7b45648f6f38e8

https://en.wikipedia.org/wiki/Itacolumite