I do as well The only reason I didn't include anything like that was simply because I'm incredibly visually oriented and since this is a going to sleep thing, I was a bit worried that 1. I would get distracted from actually trying to go to sleep and instead my focus would be on trying to visualize the water.... and 2. That I don't clutter it up and cause the subconscious to be trying to focus on too many things at once.

More induced imagery though might be helpful for easing into a relaxed state in the early parts of the mp3... almost sort of start it off like a regular meditation type thing rather than just nice nature-y sounds to fall asleep to?