Here's a video showing how to build a "scare box", which I understand originated in Amish country 150 years ago: https://www.youtube.com/watch?v=6cQCc-Zr1gg I have been wondering if one could not use this basic concept turned 90 degrees to make a drop panel? It would have to be sturdy material, for sure. Ideally, it would trigger a sound as well. The monster would not need to pass the window - though I think it is was an old mophead, if could... ...