Are these dreams or hallucinations?

Quest for Lucidity
1

Hello, I have started training to become lucid. I realize that everytime when I am on the verge of falling asleep I would have like this short bursts of period that last a few seconds to mins that I experience that I am dreaming.

During that period I am in a different place like as if I was dreaming. However, I will brought back to reality within seconds to minutes and then a while later it will happen again.

Are these short episodes dreams or are they [/b]just mere hallucinations?

2

It sounds like vivid HH to me.
You actually have a kind of dreams even during the deep NREM sleep stages, but they are usually random images or sounds instead of actual events.