['I heard something scraping on my window last night. I got up to investigate.', 'Scary!!! What was it?  Were you terrified or just curious?', "When I got to the window I didn't see anything. I opened it up and peered outside. That is when I saw a slender shadow slinking off. I was so scared."]
I would be too!  Did you try to see if you could see someone from another window or just run back to bed?  I'm glad you're ok!
Last night I heard something scraping on my window. I got up and opened it to look out.