"Hey...how 'bout we force sensei into a ninjutsu battle?" Naruto suggested

"What the heck for, you wanna end up in the hospital...again?" Shika said

"It's not like you're coming up with ideas "Mr. Know-It-All" lazy boy" he replied

"Whatever...how are you gonna do this anyway?"

"Well, if you know and obviously know...my affinity element is air, and everyone knows that fire beats air...but in order to perform Fire Style Jutsu, you need your mouth, in this plan, I'll use Wind Style: Rasengan, and sensei will be forced to use a Fire Style Jutsu, it's either sensei will have to take off his mask to perform fire or...his mask will get burned, am I right?"

"Well, for once Naruto, you're actually using your head" Sasuke said

"Hey..I've used my head a million times"

"Since when?"

"Well...there was this time when Naruto found out sensei's weakness" Sakura defended

"Anyway..ON WITH THE PLAN!!" Lee said (he finally got another line in this story)

At the Battlefield

"Where are you guys taking me?" Kakashi said, since he was blindfolded

"Just keep quiet, you've been talking the whole way here" Asuma told him

"Yeah..just calm down, Kakashi" Kurenai said

"...........ok, now you can take it off" Guy said

Kakashi took off his blindfold and saw Naruto standing in front of him, with his "batlle face" on

"Naruto, what's this about? Guys, why is Naruto-" but when Kakashi turned around, he saw Asuma and the other jonin are already gone

"I challenge you to a battle sensei, a ninjutsu battle!" Naruto yelled

"Oh...ok" he replied

"Hmph, here I go!...SHADOW CLONE JUTSU!!" Naruto made around 10 clones that began attacking Kakashi, Kakashi dodged most of the attacks the clones gave him, and all of them disappeared with a big puff of smoke. Then, he saw Naruto with 2 other clones performing..

"WIND STYLE: RASENGAN!!!" he yelled, Naruto began charging at Kakashi with his Rasengan, and Kakashi was prepared to do Fire Style: Fire Ball Jutsu

Here it comes, everyone thought, who was hiding everywhere in the battlefield

Kakashi was about to do Horse and Tiger until...

RING!!RING!!!

"Hey..what's that?" Kakashi said, unable to complete his jutsu, and Naruto stopped his Rasengan

Everyone was looking for what was making that sound, it was coming from a cellphone..notably Kurenai's cellphone (how ironic...)

Kurenai discarded the call and everyone was mad at her "What..it's not my fault?" she tried to explain

"Ok, sensei, now that that's over, let's continue our-" before Naruto finished, Kakashi was already gone

....................................................................................................................................................................................................................................

I sorta stole the cellphone idea from scorpiowarrior in one of her stories...hope you don't mind