He texted me at about 7:45am to call him for an update. He said that his doctors weren't in at VGH until 9/9:30am, so he wouldn't know what's going on next until then.
That episode with the shortness of breath is the only time his oxygen level has dipped down. By the time people came to help him in the emergency, the number had gone back to normal, and has remained so, since.
Not sure if he was sleeping in a way that had restricted his air intake or what the story is there.
Again, I'll update you as I hear more.