Also I activated the magical updraft mechanism then tried to go right and I got a void. (EDIT: this was, of course, before I got the detector - the mechanism switch seems to have disappeared and with it the void, now)
EDIT: Also also, I pretty much cheesed (is that a word?) all the spikes with my hologram (is it normal to have the hologram by then or was I just lucky in finding it first?).
- The ordering of challenges in the pagoda leads me to believe I did things properly.
EDIT: Oh man I was in the pagoda and I fell into shiftland, and in an attempt to recover, I tried jumping left, and got a wallswim.