YES! You got the reference >:D
I imagine the Stance of the Thistle Seed to be like: One leg straight, toes pointed straight down, other foot hitched into the straight leg's knee. Elbows next to ribs, fingertips pressed against each other in a meditative pose.
I swear I saw it in a Wu Xia thing, but I can't recall the title.
I just tried that one out (without floating as I'm not that advanced XD), does seem like a very wuxia/anime thing to do. I vaguely remember a very similar pose in one of the tai chi forms but the arms were different (both closer in and one was a beak) but it's been a very long time x_x
Yeh nah it takes years of training to float like that lol