((It is either happening now or later. And since you continue to whisper, it must happen now!))
Those idiots. Now there will be questions about a school play. And they are still whispering. Really, the only way to save this is to distract everyone with something completely different.
Karma stands up from his seat, pushing his chair back. He then noisily cleans his thought. He pulls out his phone, setting it to "full volume", raising it high in the air above him as a smile crosses his face. Suddenly, [url-https://www.youtube.com/watch?v=FNQTQlflYA8]this [/url]song bursts from his phone! It cuts off every "no", being replaced with Karma's voice shouting "DA!" through the phone, a crude and distracting edit. After the first "Yosiiii-DAAAAAAA", the real Karma begins singing along at the top of his voice! He starts marching in place, shouting. "YOOOOOOSHIIIIDAAA! WOOWAAAAOWWAAAWAWOOOOAWA!. When the song is half-way over, he marches to Yoshida's chair, motioning to his classmates to help him lift it. Even if he receives no help, he attempts to lift the chair above his head. If successful there, he brings the chair toward the door, finally setting it down outside the classroom. He then slams the door shut as the song ends, pulls up another chair, and sits in the doorway preventing him from getting in.
That, is how you do a proper detraction. Nobody can think about school plays any more, right?