Into scraps you go. Old pic from like 2004 or 2005.. Might do it again sometime...

I was asked "Could Sasha hold that pose with just his tail?" so uploaded this.
But could he? Maybe for about a minute, minute and half. Think of it as hooking your leg in a weird position and holding your body weight. For the lighter folks, it's easy. For the heavier and/or weaker it's doable but not indefinite.