She was tied up at one stage apparently.... Who knows, but she was such a small stature and maybe she was so drunk, scared and being in a different country, not knowing where she was etc. she didn't know what else to do, but try to climb down.
I know when I was younger I didn't always make the best decisions, especially when drunk.
What caused her to "attack" him? Why is it all taped? Even after a fight, if someone fell off your balcony and you knew it was an accident would you take off and get pizza and not check?
I don't know, he doesn't come across as a very nice character. I know that doesn't make him a murderer but still all very strange to me.