-During
the TIM talk at the control panel you hear reapers roaring here and 
there and specifically when TIM FORCES your body or will to do 
something i.e. shoot Anderson.. Harbinger is using TIM as a avatar in 
the indoctrinated dream. using his roars to subvert you. -- explains 
the multiple voices as well.

- If you notice while walking up the
ramp to get to the control panel on the left side it says 1M1..on the 
right it says 1M1 but its backwards- the 1's are completely mirrored and
backwards. Logic: in this dream: whats RIGHT is skewed, its wrong,
its not REAL. I.e. The right thing in your mind to do is represented 
as "WRONG" in this ending (dream) --- You get a renegade option (RED) to
shoot TIM to save anderson?? really? im sorry thats paragon.. but see..
its indoctrination-- its making you think its WRONG to shoot TIM to 
save anderson.
-At the end the (control reapers) area is blue lit 
(correct me if im wrong) the middle is white light.. walking towards 
the light.. metaphorical your accepting fate--accepting the idea that 
Organics will become 1 with synthetics (isnt that what reapers are doing
anyways?) -- the RIGHT side is painted red (renegade) Destroy 
synthetics... but its the RIGHT thing to do.. Mass effect 1 through 3 
is all about DESTROYING the reapers... harbinger wants you to think 
its a wrong thing to do...

the "secret" ending: you wake up in a 
pile of concrete (its been said before) -- citadel obviously wasn't 
concrete -- you fought and broke your will against harbinger/reapers 
as in your dream you pick yourself up your standing two hands on your 
gun not even acting injured as you destroy the one thing that will bring
about the downfall to the reapers (opposite of what they want.. so you 
broke their WILL against you)