I have experienced something that sounds like this, but during the first few minutes of falling asleep after a long time without. Sometimes I woried that I was

I have experienced something that sounds like this, but during the first few minutes of falling asleep after a long time without. Sometimes I woried that I was going to "pop a vessel", but after a couple of times, didn't worry so much. Is it the same thing as you mean? I never experienced it "spontaneously", only while settling down to sleep before drifting off.