This is a "bloco." It consists of 2 semi trucks pulling special trailers surrounded by approximately 4500 people wearing a purchased T-shirt while walking & dancing inside a continous thick rope. The rope is carried by hundreds of beefy guards constantly pushing outward. I (Jerry) am on the back of the band's truck, the truck in the distance contains a bar and toliets. It is literally a moving mosh pit - anything goes.