There are several doctors wearing gowns and masks in an operating room. There is a large missile or bomb on the table. The doctors are operating on the bomb.
The doctors are performing an operation on a bomb rather than a human being.
Are they trying to repair or disarm the bomb?
Damn it, I'm a brain surgeon, not a rocket scientist!
scene: an operating room description: There are several doctors wearing gowns and masks in an operating room. There is a large missile or bomb on the table. The doctors are operating on the bomb. uncanny: The doctors are performing an operation on a bomb rather than a human being. entities: Surgery, Rocket. caption: Damn it, I'm a brain surgeon, not a rocket scientist!
A play on the term "rocket scientist" --- usually, this is used as a figurative expression to mean someone smart/qualified broadly, so to be "not" a rocket scientist would mean not smart or qualified. However, here, the person is actually quite smart and qualified --- they are a brain surgeon, and the expertise they are being called to use is literal rocket surgery. A brain surgeon is not a literal rocket scientist that can fix a rocket.