Complex sentence: He fails, being severely frightened by several gremlins holding a mask of Joseph Stalin, and the gremlins succeed in disabling him and ejecting him from the bomber by cutting a hole in the fuselage beneath him.
Split into simpler sentences: He fails, being severely frightened by several gremlins holding a mask of Joseph Stalin. The gremlins succeed in disabling and ejecting him from the bomber by cutting a hole in the fuselage beneath him.