I'm not a physics student (I was a long time ago) but I find the General Relativity subject extremely interesting. I'm very interested in the way the (I don't even know how to call it) "fabric" (the another dimension used to represent objects' gravity/energy) behaves. For example when I searched what happens if two immense planets almost collide when moving fast towards each other (and their gravity fields collide), they create sort of ripples (of gravity) in that "fabric". What happens when something drastically changes it's speed all of a sudden or drastically gains energy, is the fabric "elastic"? Does a concept similar to "G" force exist when changing energy quickly? If anyone can point me at reading material regarding these questions or give me a short description.. Even if I'm viewing it all wrong. I couldn't find anything that answers these questions. Thank you very much!