I shadowed a RN and a NP, neither of which I put into my AMCAS nor AACOMAS. I included the experience in my PS because it was a factor that helped me switch gears early in my UG career. It's also on my resume, I personally didn't see any fit for it in the actual application though. If I did put it in my application, the description would essentially re-hash what I included in my PS -- reasons I didn't want to pursue that route. Anything extremely positive or encouraging you extract from that experience, I would fear, could be taken the wrong way. Perhaps there's a way you could spin it so that it works, I'm just offering my thoughts.