Yes, Suninmyeyes raised a very important point here. It depends on your level of awareness...I know this state also under the name "false emptyness". It is pretty much like a hibernation state. As Suninmyeyes said, some Yogis deliberately cultivate such stages but these are all lower-level samadhi-states. I personally had similar experiences for some time when I would close my eyes and then open them and an hour was gone and it had felt like a second.