lol, i like the premise of this it made me laugh.

hmm well I think its a funny idea....I just don't see there being a lot of potential for animation with this idea. Pretty much all its going to be is a voice over, then two guys stepping into the shot with their backs to the camera.

Maybe try having a crazy old man delivering the line on top of the port_a_potty. Start close in on him so you cant see what hes standing on and slowly have the camera track back to reveal the man delvering the line ontop of the port_a_potty and the two men standing in front of it.....I don't know, you don't have to use that idea but just throwing something out there.

Keep the idea just work something else out because right now it seems the animation is going to be very boring. Its such a good audio line, it would be a shame just to use it as a voice over.

Yeah i'm with Rico boy on this.  I think it's a great premise... it just isn't quite reaching its potential.  Maybe you can do some interesting staging where you see two guys about to face off... they're staring each other down... rolling up sleeves.. whatever.  You could even do close ups of their eyes... cracking their knuckles.  You could play it off like they're about to fight, and then when it goes down, they both race to the portapotty!.. They're pushing and shoving each other fighting for that door.  It might be a lot of tricky work, but I think it would be cool.  If you go the route of close ups, it actually wouldn't take a lot of animation work.. so you can focus more on the end when they're fighting each other for the door.  Then maybe as an additional gag, maybe one of them wins and gets in, but then gets thrown out the door, as it's already occupied.  I dunno.  Just my initial thoughts.  Great premise though!  I'm looking forward to seeing more!

I like your second idea, can't wait to see more
Keep up