According to this NPR article, Paleontologists in India uncovered a haunting scene: an 11-ft constrictor coiled inside a sauropod nest, poised to strike a baby long-neck before it could crawl to safety. Who wins in a fight between a prehistoric constrictor and a baby sauropod? Mother nature, apparently. Both animals were covered (presumably in a sand-storm or flash-flood) before they could resolve their conflict.
Fossils, gotta love em!
Full publication of the findings can be found here.