I can't find a video of it but it was from a 1987 movie called Project X (not the new film

) where they were using chimps and orangutans to test how pilots would react after getting hit with radiation. And Matthew Brodricks character tries to save them, in one scene one of his favourites, an orangutans gets trapped in the room after being exposed to radiation and Matthew brodrick can't let him out because everywhere would be contaminated and it's the most heartbreaking scene ever