excellent!

excellent animation, but the only..... very slow

Not bad but...

there are a few things you need to fix up once you do the real one because, you said this was just the idea of it.

1- make the animation smoother instead of frame by frame
2- once you do that, speed up the animation.
3- it's madness dude! Throw in a couple more kills!
4- But in some recognizable characters like Tricky and Jebus and stuff like that.
5- PM Cheshyre, and ask him if you can use some of his awesome madness music. He does some good songs.
6- Change the scenery once in a while dude! Have an explosion throw them all into a different room or something like that.

That's about it. Keep those in mind when you're making the final copy, all right? Oh, and I really liked the idea of writing your username on the wall with graffiti.

could be better

It wasn't complete horse shit. I'm not gonna be hard on the lenght since you said this was going to be in a collab. But I assure you, it would be ten times better if you sped up the movements. Seriously it looks like they're in some sort of slow mo limbo shit.

And maybe a few more killings, it is madness

I've seen worse :p

I can tell you put effort into this, (evens though there doesn't seam much of it)
like you said, you need 2 smooth it out a bit more, you should also choose some better music. and whith your music, you should make shure the sync on the music track is on stream so you don't get that bleading sound effect (where the track keeps going, evens though the movie is over)

you should also have more of a build up. instead of everybody dieing withing 5-10 seconds. (start off with an intro shot, and tackle one enimy at a time kind of deal)

I can tell there was work into this, but unfortunatly, it's not passable

It was good.

If you made it longer and smoothed it this would make a really good madness flash.