Spontaneous Singalong 

I'd be in the audience like " shit, I don't know this song! "

That grumpy man in the beginning tho ,I’m glad he was able to sing along in he end .

I guess you had to be there.

I thought he said " Were all gonna die "

who was duin the omnious vocalizing the background?

Nothing spontaneous or unplanned about this! It was clearly prepared and planned beforehand. Sure, it may have been unexpected and surprising, from the audience's point of view, but it was absolutely NOT "spontaneous"!

Not really spontaneous if u asked them to help :/