As shinsuke finished demonstrating the technique he had been trying to master since before the Chunin Exams, a realization struck him as he noticed even after his training, he was still unable to fully complete his own jutsu to make it usable. Shortly after, a irritation came over the young boy as he watched a mere clone of the Uchiha perfectly perform the technique without any real effort. While Shinsuke was usually seen around Uchiha's rather it was his best friend Gyoken or one of his sensei's Mugen; He couldn't help but despise the Uchiha for their annoying Sharingan. He agreed that it was useful tool in battle but he also viewed it as the "weak lineage" since it allowed them to copy anything after only seeing it once with no real training or effort. That fact alone made him hate the sharingan and it was something he felt was only needed for people without any real talent. His annoyance was clearly visible and was already regretting agreeing to the training as his own jutsu was mastered by another without form of real training. The words that was followed by Mugen only pissed the young Uzumaki off even more, especially after calling the technique he's worked so hard on to be called "easy" all because of that stupid eye. Though as he continued to listen more, Mugen also mentioned something else that he had already been quite familiar with.
The demonstration that followed after was just as he had in mind already, though he was impressed with the amount of damage he did to the crater itself, he knew his sensei was holding back on the punch but he also knew that the amount of force HE could put out more power himself. However, since Mugen wasn't done with the demonstration on the technique, he carefully listened and observed the second thing he was there to learn. By the looks of it, it was simply thing to do as he wasn't useless when it came to controlling his chakra, he just had dificulty controlling compressed ninjutsu that stored so much power in a smaller structure. As such, Shinsuke began speaking to Mugen while simultaneously channeling his chakra through a single arm instead of both of them. His previous training only made it easier for him to actually use the technique he was being taught.
Shinsuke: My issue isn't with controlling the chakra itself, using it to enhance my strength or to increase the duration of something im using isn't an issue. This is an easy technique, I've used to enhance my chains and since my own session moments before i met up with you, only furthered my control so this isn't a problem for me.
With that said, Shinsuke struck the ground utilizing a slightly higher amount of force than the clone of Mugen, but this is where the power of the young Uzumaki actually showed. During the connection with the ground beneath them, no only did a large crater twice the size of Mugens carve itself into the ground, but it cracked and formed massive snowflake in the ground itself. The young man even release the chakra afterwards and caused the entire area of the crater and cracks to erupt from the ground and scatter in an omnidirectional manner. Shinsuke glanced at his hands afterwards and startef to channel more fire chakra within his hands but unlike his own jutsu, this was a simply channeling of wild but controlled flames. He pointed his own arm towards sky as well and followed the instructions of Mugen's clone. As he did so, while his wasn't as impressive as his sensei's he did alter the fires physical form and caused the fire's form to extend to the the size of large Nodachi blade.
Shinsuke: This stream technique, its different. Its not as easy as the first technique but its much easier than my own jutsu. A couple more tried of this and i'll have it down. Using chakra to enhance my strength comes easier than controlling a jutsu that requires the compression of a large amount of force and power into a small technique. I'm desiging it off the infamous rasengan, think of it as a fire variation of that.