First one is possible. Sort of. http://www.youtube.com/watch?v=y3E9lwC-m7A&feature=player_detailpage#t=704s
The refusal ending is just Casey being "WELL IF YOU DONT LIKE MY ARTISTIC VISION THEN DEAL WITH IT >>>:(((((((("
Well you go through the whole game gathering people under the idea that the Crucible is a Reaper killing superweapon, and you are told at multiple points that the Reapers can't be beaten by conventional means and has been proven such in the past, and you are upset that by rejecting the superweapon you can't beat the Reapers by conventional means?
I was just wishing for something a little more climatic, the kid literally just says "SO BE IT" and disappears, I wanted a giant series of failures in cutscene form. But I am not gonna argue, since I posted this for humor and I am tired of every ME3 thread/subject always ending up in a discussion about the endings.
That would have been awesome. Maybe have "Leaving Earth" play in the background as it happens. Yeah, I'll stop as well.
Goddammit rask, I was about to post this. It's just so accurate to this thread. Also, somebody actually missed on purpose in Garrus' final thing? A bunch of wieners.