DECOY
But I was the decoy! Towards the end of the Wave 6 hack in the middle of Hazard Giant, I was getting stomped and revived at the same time. So I hit a gel. This was all while another pug was shooting at the dude stomping me. tl;dr I gelled, got revived, and wave ended all at the same time.
This resulted in a glitch where I was stuck in spectator mode for the next two waves, despite my character being alive and standing there in the corner. Two pugs died Wave 7, so I was spectating the remaining guy, an AIU who ran two circuits around the map to fill up all of his Grenade Capacity V Noob Stims. When he came back up around top, I had all 8 enemies circle jerking around me. In addition to being alive, my character was also invincible.
AIU picked them off and Wave 7 completed. This did not fix me. At some point during 8 or 9, I spontaneously got the "mash button or gel" message in the middle of my screen, so I was able to gel and regain control of my character. Despite being incapacitated for 2 waves, I still topscored the lobby.