lol...that exact thing happened to me yesterday! i was standing talking to friends when all of a sudden from deep inside the middle of my belly a gurgling rumbly sound came out! it felt like gas or bubbles or something travelling from lower to upper of my insides! AND it was really loud! I don't know if anyone else heard it but i thought to myself " Is this how you start to feel your baby moving?' I am only 13 &half weeks so i think its a bit early for me BUT it certainly was a strange and new sensation!