its funny you should post this now because i was just thinking about a time that something similar happened to me, there was a week where it actually happened twice.

the first time i was dreaming, about being in an old town that was circled with fences and there was a funeral prosession for a small child who i thought was a girl in the dream and she was burried by a large thing of roots on the outskirts of town that came out of the ground and looked like spider legs, when i woke up i was laying on my stomache and was opening my eyes and when i opened them once registered something was there opened my eyes very quickly and there was an orange and black spider on the pillow that would be the size of a large hand. i backed into a corner of my room and the spider wasnt there after i blinked from hitting the wall.

the second time it happened i cant remember what i was dreaming about but when i woke up and turned around to hit the snooze button on my alarm clock a saw a glowing ball of light or energy in the corner of my room where the walls meet the celing and thought i saw it pass up through the celing gave me a start both times.

i'm fairly certain that the first time was a fragment of the dream manifesting it self someway in my half asleep mind and the second time i'm not so sure about simply because i can't remember any dreams that i had that night. let alone one i was lucid in.