I agree that it was a low-level lucid.

As for the reality checks, I'd highly recommend doing at least two, just in case the first one doesn't work. Try looking at your watch a couple of times and see if the time changes. Or look down at your hands and see if there's anything different about them. You can also look around you and see if the way you see things is different, such as if everything is more clear or blurry or not where it's supposed to be.

-Amé