Neither are. Seeing as how this is what they're trained to do and this happened in matches between smallfry, you can imagine that this is a process they do often and through many generations. The fact that they know exactly what to do flawlessly indicates years and years of practice and training, which means they've been doing this without Tsunade. Sakura in the chunin exams, when she was still pathetic, could do something similar. Ninjas can control the earth through what can be considered telekinesis, same as water. Nothing about this is special or stands out in any way, especially not in regards to Shizune.