[@MyCatGinger] I had weird things happen to me like that a year ago where I thought my bed was flying through space and time and just weird sensations and dream elements that were just flooding my awake brain. I'm pretty sure it has to do with the transition from REM sleep to awakeness, and theres a stage with Theta waves or some shit. I forgot exactly what it was, but basically it makes stuff like that happen and it's totally not indicative of any serious mental health problems so don't worry about it :)