Indiana Jones and the Kingdom of the Crystal Skull is known for two moments of shark-jumping controversy. First, surviving the nuke in the fridge. A classic, and something that has become shorthand for inexplicable elastic-band realism in blockbuster franchises.
The second is something altogether different – and out of the world: the inclusion of aliens (or interdimensional beings, if we're being pedantic). In a series that included the Ark of the Covenant, the Holy Grail, and Sean Connery riding shotgun, this close encounter went too far out of Indy's whipping wheelhouse.
