I am usually on the MAC and Bronchiectasis support group. I did see a few minutes ago the vibrations when falling asleep and waking. I use an airway clearance machine with a vibrating vest. It shakes your chest pretty good. I do this in the morning for 30 minutes and again right before bed. After I quit and was in bed, I sometimes will feel my chest vibrating. I was off the vest and in bed but I could still feel the inside of my lungs vibrating. I have on several occasions felt the same vibrations when awaking in the morning. There will be a minimum of 6 hours since the last shaking session. I have been using this machine since 2012 and only felt this sensation 7 or 8 times in that period. I kinda knew what it was so didn't worry. I felt it 2 nights ago. I have come to the conclusion that we simply do not know everything the body is capable of and probably will never know.