MOJO (my pet hamster) has been doing this continuously for the past few weeks. The first time he did it, Pezal and me were about to tear up, screaming MOJO MOJO. But guess what? He woke up and started towards the side of the cage, expecting some treats. I swear it's the epitome of "tidur mati" (dead asleep)
It's happened so many times we don't bother anymore, so I bet it's gonna be a real shocker when he really has gone over to hamster heaven.