Yeah, my current apartment is in the path of a small urban one for a little while in the spring and fall when the sun is in the right place. It is surprisingly annoying, but tolerable for me since it is just a short time of day for a short part of the year (and I don't get seizures, important since it seems to flash at seizure-triggering speeds). The big ones look like they are slow enough to avoid triggering seizures but would otherwise be worse, lasting longer each day and for more of the year and would be just as annoying. I never considered this side effect until it happened to me.