Comment by AnimalMuppet

No, it's not weird. Ideas come where they come. Wherever you get them, be ready to grab them.

Keith Richards (of The Rolling Stones) kept a tape recorder by his bed, for exactly this reason. One morning he woke up and found that the tape was all the way at the end. He re-wound it and found that he had played a guitar riff and sung the words "I Can't Get No Satisfaction" several times. The rest of the tape was of him snoring.