*SPOILER*
You have to stand at the box drop button, watching through a portal to see when the platform comes. Push the button, open the first door, portal to the other side, open the second door. Then portal a hole in the low part of the ceiling over the goo pit and grab the box as it passes under.
Wait a minute! Are you suppose to get only one box out of this contraption? Because I got 2! plus the one up top makes 3!
So I already had 3 leaving this room! before the one from the lift to the acid room one, thus 4 total.
thats right I had 4 boxes and use all for to get to the last room.
Did the map mess up in my favor?
bubbasteve8 2 years ago