meditation sounds at night alone source sounds sm stereo

starting a meditation session after some guided meditation — all silent and alone in the dark eyes closed on bed— seeing colors and shapes on my eyelids — I get these visions of giant bugs maybe attacking me or talking to me then horses .. I sorta say the word horse and such — mutate the word and such — then back to the hummming and mmmmm-ing going on- I did say another word maybe or just a kinda sound like thing.