I-Shaped Balance / Standing Split - Gellie tries the vertical split

Actually, that probably makes it even harder, as her being a chubby amorphous blob means that lifting her thick legs would be extremely difficult, since there's no supportive structure to her body.
A thinner slime-girl could do it easily, but her chub would constantly try to keep her legs touching the ground.

Who cares if she is not flexible enough when she is that cuddly?