assuming those two are steps, it probably doesnt matter what order you do it in. but to continue the madness, the ultimate step could be throwing a monkey bomb outside the knocking window and using a bunch of PaP'd super weapons (ray gun, thunder, ballistic) and blasting the area similar to power required in the last step of ascension's EE.
http://www.youtube.com/watch?v=AQVup0lrZuA
Again, assuming we aren't chasing our own shadows here (WHICH I REFUSE TO ACCEPT) an upgraded ray blast to the panel of each of those randomly - and often blatantly - placed power generators might be involved.
Another possible step might have to do with the multiple electrical panels/levers/gadgets on the stage walls?
Another step might involve the hanging wires above the teleportal in the stage?
And damnit, that MANHATTAN DOWN and surrounding letters has to MEAN SOMETHING! and not just a stupid reference to the Manhattan bomb project or whatever.
Remember, there are 7 power boxes. the 7th one being the non-red one in the alley. http://www.youtube.com/watch?v=4c9W3xgcrJI
Also, the portraits. possibly each player has to hit his own portrait? maybe the knocking bum is the blank portrait.
*takes deep breath*
as a final note, i hate you 3arc.