I can forgive some of the disbelief scenes in Raiders and ToD because they are presented in a more serious context than the silliness of LC and KOTCS. Plus, I have to remind myself that my views of the films change as I get older. When I saw Raiders and ToD as a kid, I didn't think twice about the plausibility of Indy taking a ride on the sub or him, Willie, and Shorty surviving a tumble from an airplane in a raft. In fact, I thought that the ToD scene was exciting and thrilling. I saw LC much older and KOTCS as an adult, of course, so I'm not as forgiving.