For the most part, the instructor remained silent as he observed the two students battle. Mentally keeping note of their strengths and weaknesses, commentating to himself, and otherwise critiquing them to himself. Eventually a hand wandered outside of the sleeve of his haori to grasp at his own chin as he focused. Things were getting serious.
For most shinobi, the same attack rarely worked twice on them unless it was for some reason or another ridiculously wide-ranging or unavoidable. Techniques like that were rare but they did in fact exist. Shun's cannonball on the other hand...
...was not one of those attacks. And yet it seemed to work just fine! Both she and Masashi were still ninja-in-training and had a lot left to learn, but it seemed the Nara had a better battle sense than anyone expected. Sarutobi Masashi was a direct and straightforward fighter but he was no fool. The boy likely expected her to try a different avenue of attack.. so when she performed the Shunshin no Jutsu for a second time and struck from above he was completely unprepared for it.
"Oof!" A grunt echoed throughout the gymnasium as the curled-up Nara girl slammed into him, the attack glancing off of the boy's back and sending him careening forward to tumble to the ground. With the added mass from the weights the technique had no trouble sending him skittering and sliding along the floor, knocking the wind out of his lungs even as he used his hands to break his momentum and struggle clumsily back to his feet.
"Why you..." He muttered, grimacing as he wobbled a bit in an attempt to regain his balance before bending at the knees to rush in again.
Until a flash of sudden movement appeared and a hand grabbed the hood of the sweatshirt he was wearing to stop him cold.
"Hold on a second." Izusa said, having zoomed over to intervene before someone got seriously hurt. He glanced over to where Shun had landed briefly to see if she was alright as well.
"Lemme go, Izusa-sensei! I almost had her!" A shout came along with a bit of flailing, but the instructor only gave a concerned glance to the child before shaking his head. Izusa brought his free hand around to the boy's face and held up a peace sign.
"How many fingers am I holding up?" Silence, then...
"Four?"It was all he needed to hear.
"...yeah, let's go ahead and call it there. Shun-chan wins this one." Several cheers erupted from the observing students along with a bit of clapping. Izusa watched as Masashi hung his head and started to sulk a little... but he moved his hand from the boy's hood to his shoulder.
"Don't get too down on yourself. That was some quick thinking with your Fūton jutsu, we just need to hone your situational awareness. It comes with experience." He said with a reassuring nod. Time and training would adjust for that. Shifting his gaze to the young Nara, the instructor's smile widened a bit.
"Excellent reading of your opponent Shun-chan. And good job turning a disadvantage into an advantage in regards to the weights." It really was quite an impressive showing. At every turn this new generation had been exceeding his expectations and then some. Even though his teaching was only ever meant to be a front for his true work within the village he still couldn't help but be proud of his students.
Seeing them adapt, grow, and overcome had proven a more fulfilling job than he ever expected. It came with its own headaches... but really those were nothing compared to his other duties.
"Let's see a Seal of Reconciliation you two." The instructor spoke as he motioned for the two students to approach one another and perform the traditional gesture. Rivalry or no, they were still comrades at the end of the day. And he always made sure to stress that.
Once they had proceeded he would smile and nod to each of them, trusting them both to remove their own weights and take their seats again.
"Alright who's next?" Izusa turned to watch as a sea of small hands shot up in the air, and in response he could only really smile. For the rest of the class the bouts would continue as planned but none quite so exciting as Masashi's and Shun's. Once they were all done and the bell had rung... his gaze shifted to the floor.
Cracked, scuffed, and dented from all the movement.
"Maybe... we need to work on control next." Izusa muttered, his free hand rising to nervously scratch his chin. Fortunately a little collateral damage was a small price to pay for valuable insight into both Shun and Masashi's individual skillsets and learning hurdles.
"Okay, class. Next lesson: Shinobi Refurbishing One-Oh-One!" But it was too late. The kids had already begun to file out of the gymnasium leaving him alone with the scattered equipment and busted floor.
"...class?" Izusa asked as he watched them leave.
All he could do was sigh and hang his head. In the classroom, at the training grounds, or in the gym— things always seemed to break wherever his classes took place.
"I'm definitely going to get chewed out for this..."