Anything very difficult and technical: This game isn't brain surgery, but it teaches them to vent without hurting someone/ If a guy doesn't know he's being tailed, well, tailing is not brain surgery (1990s+)
Being funny is just as rare a skill as a facility for brain surgery, playing the piano, chess, or advanced mathematics.
But each time an injunction which had been built into them at the time of the brain surgery prevented them from staying.
On her way out of the room, she picked up the book on brain surgery that she hadn't yet had the chance to read.
"I'm trying to find something on brain surgery," he explained.