An unusual Cap shield setup in outer Xandar.
You need to have all the shield bumpers inside the chimney here, not facing the camera. You can do this by stepping on the middle pressure plate, then the left one. If you you've already stepped on some plates, know that the left plate switches the position of the bottom two bumpers, the middle plate switches the two middle bumpers, and the last plate switches the two top bumpers.
You'll also need an acrobatic character to rod-jump up the stage-left building, and hang from the switch that allows access to the shield receptor.
When all this is in place, have Captain America stand on the shield base, and take aim at the lowest bumper to win this brick.