Odd, something similar happened to me last night.

I was starting to fall asleep but got some very dream-like images.
A hand came out of a screen and grabbed my head and I realized I was starting to fall asleep, not totally awake or asleep-then I got a very loud buzzing in my head and I felt like I was being pulled into a dream. Went with it but didn't make it.
The second time something like that has happened to me.

It might be a good way to get pulled into a lucid dream.