Being squeezed into a tunnel with difficulty breathing

So, had a lucid dream last night. Was doing pretty standard stuff, talking, sex, fighting etc. At one point I decided to lye down to meditate. Usually what happens after this is astral projection.
This time it was a little strange. I closed my eyes and saw a tunnel I decided to go in. It was first black and after filled with colors. What was strange was the feeling of moving at an incredible speed through it. So fast I felt like speed force was squeezing me making it almost impossible to breathe. Not sure what happened after this, I think a change of scenery or I woke up.
What happened?