I've never experienced sleep paralysis, but I have had hypnopompic hallucinations, or waking hallucinations for a few fleeting seconds upon waking up. Usually, they were large shadowy insects scurrying around that would terrify me. After jumping out of bed and turning on a light, I would realize that they weren't real. After a few repeats of this, they would still startle me but I knew that they weren't real. After getting into a normal sleep schedule and getting rid of some stress, the problem went away. I've experienced it once or twice since then, but nothing major.