Why would Indy survive a nuclear explosion in a fridge if its impossible?
The Indiana Jones films are modeled after old matinee serials of the 30s and 40s. The adventurers in the old serials sometimes survived impossible situtations because the medium was created for entertainment, and as a result, reality took a backseat. The Indiana Jones films have all taken liberties with what’s possible and impossible in return for entertaining action and adventure. The type of serial-like adventure that the films portray is not everyone’s cup of tea, but they do harken back to a more innocent time in filmaking.