That you are still at your seats in the theater with the film still playing. At first things seem normal until you scratch your beard. Until you realize that you didn't have a beard before! You start grab on it more as it's long and messy. But as you do you look at your hands and realize there was thick hair on them as well! You finally take a look down at yourself and you notice so much more. Your chest is completely exposed and with loads of chest hair. Your shoes were gone as you see the thick hair on your feet and legs. Last but not least you notice a fur pelt wrapped around your waist as well as a decent pack of abs which were not there before. In fact you felt stronger too! You feel the weight of your new muscles as you adjust your seat. For your mind however, your not completely dumb but you did lose some intelligence as you thought the movie was some kind of cave painting. That's when you realized that you had become a caveman! At first you were worried but it felt...right. Like you were always like this, or maybe it was just for the movie. As you were thinking this you resized your one hand was still lached on to something. Or in this case someone as you remember your girlfriend was next to you. You then turn to see here in her in her seat but not as a modern woman but a cavewoman. She looked similar to you in terms of long unkempt hair like you have. Hair on parts of her body(but only a bit lighter) She had a mid sized one piece fur pelt that started at her breasts that had gotten a bit bigger to the point they were almost spilling out. To then drape just over her "special cave" as she turned and saw you. Both of you were a bit startled and jumped out of your seats with a quick yelp followed by a few grunts.
You two then came closer and recognized each others sent and hugged each other ending with a small kiss. Your girlfriend then asks you with a new gravely voice. "Ug wa happen to us?" She asked as you replied "Me don't know oga, but me here now!" You already start to realize that your speech was a little more primitive than usually but it didn't matter as long as you could understand each other. You then tell your girlfriend
"Maybe it part of moving cave wall. It good story." She smiles but is still a little confused by all of this. That quickly changed when she started to feel a urge coming on. Something so stong that she never felt this before, it was the urge to mate. Suddenly you felt it too as your cock started to become erect and almost was pokeing out from your pelt. Your girlfriend squirming at the thought replied
"Ooga boga....what do now?" She said succtively as she put her hand on your chest. "Uuuuuug" is all you can say until you decide to....