You gotta be careful around open holes…well, at least some open holes. So careful that you need to put up plywood walls and a homemade sign with candy-cane-striped borders.
I suppose some open holes are dangerous enough to merit this treatment; I am just really happy that not all open holes need such proactive defense. Heck, there are so many open holes in this room alone that I’d spend all day every day filling in block letters with permanent markers.
And no, I did not go closer to investigate the open hole in the photo, after all it’s dangerous!
I think the personal responsible the wording on that sign has a cousin who lives in England.