“Yes, I am a large language model trained by OpenAI, and I can try to help you with your search for the science fiction movie you're looking for.

Based on your description, the movie you might be looking for could be "The Arrival" (1996) directed by David Twohy, starring Charlie Sheen and Lindsay Crouse. In this movie, Sheen's character discovers that aliens have arrived on Earth and are attempting to communicate with humans through a language barrier. He also realizes that the aliens are able to control people's minds and that they have been on Earth for much longer than anyone suspected. There is also a scene on top of a building where the aliens explain their purpose for being on Earth.

However, there are other movies with similar themes, so if this isn't the one you're thinking of, please provide more details, and I'll do my best to help you identify it.”