Everybody loves a melting Nazi. Everyone also remembers this scene and even years later with the ability to freeze frame and check out how they did the effects shots, watched as a whole it's an amazingly chilling scene. One thing I find fascinating about the scene is that they just get on with it, they capture Indy in the scene before and twenty seconds later Belloq is opening the Ark. You wouldn't get that today, there would be some sort of extended unneeded build up. I've written before about actor Ronald Lacey who played Major Arnold Ernest Toht in Raiders of the Lost Ark so I'll let you check out his un-melting appearance here, and make sure you check out his pal, Oberst Dietrich, melting away too.
Here endeth Indiana Jones week, I doubt it will be long before I draw more from these films :)