In Griffin v. Hess Corporation, 2017 WL 5125657 (5th Cir. Nov. 3, 2017) (unpublished) the U.S. 5th Circuit reaffirmed the difficult burden of proving that prescription should be excused under the Louisiana jurisprudential exception of contra non valentem non currit preaescriptio. Contra non valentem “means that prescription does not run against a person