Stupid question

This is to anyone who may want to answer. Can cats have bad dreams? no.... not just a bad dream a night mare? Last night I was awoken to what sounded like moaning or groaning.... My first instinct was it was my husband having a bad dream and I went to comfort him but he was sound asleep not making a sound. Then with about maybe two more neurons firing I came to the conclusion that the pitch was to high to be my hubby and turned my head looking for what it could be. It was Kit at the end up the bed. When I reached down there to pet him he woke and started biting the crap out of my hand. I let him bite me, (when we play with him he bites having no front claws and it really doesn't hurt. He has never drawn blood very rarely breaking skin,) which went on for a good minute before I could pet him with my other hand. He gave up biting and laid back down but he wasn't purring like he usually does if I even look at him. The only thing I can guess is he had a night mare but what in the heck does he have to have a nightmare about? He has never been abused, or hurt... He has never stepped a foot outdoors unless he was on his leash on the porch with either myself or my husband watching him. No children or other animals to terrorize him....  And this AM I checked him to see if anything was hurt and he just purred his little butt off at the attention. I am at a lost here.