These DOCTOR STRANGE Outtakes Are Sure to Make You Chuckle

After watching these brief and pretty funny outtakes from Doctor Strange, I just have one question: Was that fart real? Or was it acting? I've watched it seven times now, and I still cannot tell if Benedict Cumberbatch is using his mouth or not! Did he throw his voice, was it post production or maybe even someone off camera? I feel like I need to know the answer, so let's tweet him nonstop until he confirms one way or another. Doctor Strange comes out on Blu-Ray tomorrow!