Watch Twenty One Pilots Perform 'Kitchen Sink' With Tyler Joseph's Brother

Twenty One Pilots closed the first leg of the US Emotional Roadshow dates in Madison Square Guarden with two sold out shows in a row.
For the last show, Tyler Joseph's brother Zack Joseph came out when 'Kitchen Sink' was being performed.

The studio version also has Zack Joseph on it.
He raps a chorus.

Last night, he performed this chorus himself live.

Check it out below on both the big screen aswell as close-up (ish).