Indiana Jones and the Kingdom of the Crystal Skull stories

We can all pretty much agree that the high water mark of the Indiana Jones franchise was right before Indy climbed into that lead-lined fridge to escape an atomic blast. "Nuke the fridge" has since entered the pop culture lexicon as a term synonymous with creative overreaching, but Indy writer George Lucas doesn't care if you liked the stunt or not.
Steven Spielberg and George Lucas have worked in tandem on the last four Indiana Jones films—with Spielberg handling the visuals and Lucas in charge of the script. While that arrangement worked like a charm for the first three archeological adventures, Spielberg admits there were ... problems ... with Kingdom of the Crystal Skull.