On Cinema, there were around 9 players and at the end of the round I was last remaining survivor and was killing all the zombies off. After searching for the last one and killing it, that zombie ragequit and for some reason I was infected and turned into a zombie literally 6 seconds after he left.
This has happened a few times to me after killing a bunch of the zombies, and one of them leaves. Often I'm infected at random points in the round, and when I turn there's a whitey, and like four normal zombies; and they didn't only just join within the past 10 seconds. For some reason it just randomly infects people when some zombies leave.
This prevents humans from winning on obj maps sometimes as they're about to win and turn into a zombie. J/w if this was intentional or not, because it usually just upsets people.
I love it when whitey rages and it infects somebody, but not when zombies don't need the extra help..