Wow, thanks for sharing. That sounds like a really rough surgery experience. If I remember right, I think I could feel the pleural friction rub more when I was laying down as well. It's probably just easier for the lung to slide around in that position. I hope the surgery worked for you and your recovery went well. I'm late responding because I didn't notice your comment until now. Anyway, glad my words could help!
I am a software engineer at Adobe working on the Adobe Experience Platform Web SDK. I am a fan of documentaries, podcasts, and bikes.