The layers of rubber sounds like the last bit of sleep paralysis and you becoming conscious of it before you woke. I had this just two nights ago, except I dreamt my dog (a huge Alaskan Malamute) was lying on me and I couldn't move, as well as getting mouthfuls of her moulting fur! After struggling for a few moments I began to realise what it really was and stopped. This way, I was actually able to stay in the dream a bit longer. Anyway, congrats. This is my first post too, although I've been lucid dreaming for a while now.