I had one exactly the same, huge, it wandered into my apartment about 4 years ago, the same day M went back to Uk for a couple of days. I saw it out of the corner of my eye in the evening moving/sliding across the lounge floor. I couldn't breathe! Terrified is an understatement! It's all those old Bond movies come to haunt. Well I'm afraid it was it or me and I had to kill it. My biggest fear was that it might have a family (nest) too. Never saw another.