I see they've changed it a bit since I did mine in Oct 01. Probably due in no small part to them bending a few of us. There were 2 guys on the course ahead of us that got the bends and two on my course including me. I got to spend the Sat of Thanksgiving weekend in the dive chamber at Toronto General Hospital with a male nurse named Richard.
When we did it, we did 4 chamber rides. I don't remember which order we did them in but we did a rapid decompression one day, a slow decompression another day, a hypoxia run at 25,000ft and the second last run we did was pressure breathing at 43,000ft followed by a descent to 30,000 for another hypoxia demo.
The chair is fun as is the Vomitron. I think it's a pilot only demo, but they'll show you the leans as well as the Coriolis tumbling effect of moving your head too fast while turning. It's pretty fun. We also did the night vision demo unaided and with goggles in the black room. Pretty cool stuff actually, and of course the requisite laser safety lecture. After which, for the rest of your life you'll duck, close your eyes and tell those F'ing idiots to stop waving the laser pointer around.