Rob Kardashian has been absent from Instagram for a while only to return with a bold statement that has everyone talking.

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"This is my sister kim, the bitch from Gone Girl," Rob, 28, captioned a photo of Rosamund Pike as Amy Dunne in Gone Girl, covered in blood.

His Sunday post about Kim Kardashian definitely came as a shock although a source close to his family claims it's a harmless joke.

"He has a funny sense of humor and posts weird things and then deletes them," the source told People. "It's just him."

Another insider called the whole ordeal "so dumb," so no one is reportedly phased by it.

However, Rob's behavior in general is still alarming to people.

"He's been depressed and just a bit off in general," the insider explained of Rob, who has struggled with his weight for years now. "But he has always been this way. He just can't lose the weight and he doesn't try -- he just sits around."
About The Author: Elizabeth Kwiatkowski
Elizabeth Kwiatkowski is Associate Editor of Reality TV World and has been covering the reality TV genre for more than a decade.