Last night while trying to WILD i managed to get to 53 Im dreaming and then i got a feeling like i was slowly spinning. like laying down on a mary go round. I didnt eve get the HI yet. 
yep.
From my old experienced with WILD, this is normal, it realy another way your mind deals with HI, I had a few years ago even stranger feelings, it was like applying a ‘no clip’ cheats so I felt like falling through my bed and floor for a few seconds, something realy weird
I often find I have psycho-somatic reactions to WILD, feelings of falling, jolts and other things of that ilk, never spinning (yet) but every person will have different reactions.
it’s simply your mind trying to cope with the lack of sensory input, it starts to make feelings up!