After reading the technique in the subsection I understand that Kai is the process of spiking your own chakra, disturbing the disruption, in order to return its balance back to normal. The level of kai that one can use depends on one's rank (now I know why you want me to rank so bad xD) and is always triggered with a hand seal.
Skidding backwards on the training field after the exchange in blows with my sensei, I noticed his swift performance of two hand seals as my eyes widened in shock. Is he this serious!? that thought ran through my head moments before I noticed the sudden change in the scenery that followed. I frantically looked to my left, then my right, but this eerie darkness amongst a sunny afternoon seemingly surrounded me just before releasing hands that loomed out from its bowels. First the sudden change in my surrounding and now this?! This must be an illusion! I finished the thought as I struggled to wave a single hand seal allowing me to spike my chakra, and thus, clear my body and mind of all intrusions.
That was intense sensei! Now, allow me to show you some fireworks!!
Waving any hand seals needed if indeed required while taking in some deep breaths, I release a series of fireballs towards my sensei's direction without putting him in harm's way. The first fireball was small in size when it came to dimensions, but as it traveled it released such a withering heat that even being within its close vicinity would start your bodily signs for dehydration. The second set of fireballs were larger than the first one launched, and I released an amount of five towards the vicinity around sensei, all scorching the ground on contact. Last but not least I took in my biggest breath after waving any required hand seals before placing my hand to my mouth as I exhale a thin stream that expands into a large blazing fireball that shoots off forwards straight onto a pathway towards you. Frozen in shock at my lack of control I attempt to make a cry for help mere moments before its clash.....
SENSEI!!!!!