I think the saucer crash in Generations
was fantastically done, and still holds up well today. I think it is a very impressive visual effect sequence even by today's standards, and far surpasses much of what is accomplished through CGI. Even though there might be some limitations in the Generations
footage because they were filming outdoors and not using true motion control, I still think the 'physicality' of having a real, physical object being filmed gives sequences such as these a 'weight' that a CGI sequence just does not have.