So, he had to form chakra around the surface of his feet, since they were the ones touching the surface. Though, wouldn’t that mean his shoes? He wasn’t sure. Maybe he should just do both of them. He walked up to the tree. He watched Satori drop down.
Now it was his turn. He looked at the tree, then closed his eyes. He let out a huff, then a sigh, then he breathed in. he visualised the sticky substance at first, but he didn’t really like it. So he went with barbs instead. Like thorns, only he didn’t bother to imagine them piercing the skin. He focused his chakra toward his feet, thinking of the barbs that clung to the floor. He didn’t want them too long or else he wouldn’t be able to move at all, so he shortened them. Then he took in another breath, and tried to walk the tree.
Needless to say, he didn’t get it the first time. He flopped onto this back. He glared at Satori, as though daring him to comment, then tried again. It took him a few times, his barbs were too short, not enough chakra to make them stick, going too fast, his knees weren’t ready, but after a fair couple of tries, he managed to walk up a few steps up to the tree, then turned to glare at Satori, his eyes slightly triumphant.