I dunno if it was.. but I'll try explaining it.
I did BillyBob's WILD technique.. where you say before you sleep "I will not quit till I have a Lucid Dream" then breathe - in, breath- out, then that counts as one, go till up to 300.. then..

I didnt actually see random images per-se, but it was .. I felt like i was vibrating a bit.. started feeling like everything around me was spinning. and my heart rate just went UP!.. it kinda dissipated.. but I ended up kinda feeling like my head was detached from my body.. like those Bob-heads.. but yeah, I just let go and moved, and slept.

so how do I control my heart rate?