I actually could have had a DEILD during my 20 minute nap today before I even knew what that was. I woke up from my dream with my eyes closed and saw some crazy hypnagogic images. If I didn't have to wake up and go back to class I feel like I could have easily had a lucid dream. I'll probably try to get better at that, because I do find myself waking up halfway through my first core sleep.