I take some meds to help me sleep and as i have had 4 children, my bladder isn't up to its best! Anyhow some nights i dream about going into public toilets (something i'd never do when conscious LOL) and i can't find the right toilet to pee in! either the toilet is overflowing, broken or has no privacy, then, like magic, i wake up and need the loo! I have also dreamed the v* thing like you emi, and i have sat up in bed and burped. I personally think, like my body telling me i need go pee, my body is telling me i need to burp! I've never v* from one of these burps. You're just very shocked by it, like i was when it first happened to me.