Kanye West Silenced At Coachella

4/16/2016 5:51 AM PDT

Kanye West -- Silenced at Coachella

It was Kanye West's worst nightmare ... taking the stage in front of thousands ... not being able to rant or even rap.

A$AP Rocky brought Kanye up on stage Friday night as the big surprise, but Yeezy's mic malfunctioned. You hear A$AP and backup music but no Kanye.

We're told A$AP got super pissed and after the video ends, he tossed his mic.