There’s a great comedy sketch from British duo Mitchell and Webb about an egotistical brain surgeon on YouTube.
It’s sarcastic, cutting and you can see the punchline coming a mile off, but still good for laugh as it satirises the effect of the ego on typical British small talk.
The only similar joke I’ve ever tried was to say to a neurosurgeon in the pub “that’s lucky, I’ve got this thing in my temporal lobe that’s been playing up, I wonder if you wouldn’t mind having a quick look”.
Lead balloon.
Link to Mitchell and Webb brain surgeon sketch.
Mind Hacks 
I LOVE this sketch – and I think it’s precisely because you can see the punchline coming that it’s so brilliant (interesting sidelight on how humour works, perhaps? – Timing, I suppose).
Great line to try, your neurosurgeon wind-up. Pity one meets so few neurosurgeons on the opera stage……. 🙂