See Belloq’s Uncensored Exploding Head From RAIDERS OF THE LOST ARK

A behind the scenes still reveals the gore.

When Belloq's head pops at the end of Raiders of the Lost Ark it is partially obscured by flames, an optical effect imposed because the MPAA felt the actual exploding cranium was too much. I've never felt like I was missing anything, but it's cool to get a glimpse behind the scenes at what the original head explosion looked like. 

That glimpse comes from Will McCrabb, who posted the picture on his Twitter; I'm not sure where it comes from - I thought it might be from the massive The Complete Making of Indiana Jones, but I pulled my copy off the shelf and couldn't find it.