Where No Man Has Gone Before
One of the greatest things that happens when you write is that you learn. I recently wrote a scene where the characters needed to prepare a turkey for eating. I am now a couch expert on scalding the bird, plucking the feathers, evisceration and dissection. Needless to say, if I was to attempt this in real life, I imagine it would be a lot harder to do than it was to write, and there might be an added element of throwing up involved at the evisceration stage, but now I at least understand the process.
It's never a good idea to launch headlong into a scene describing something you don't fully understand without researching the subject first. It's disappointing when an intense or interesting scene turns cold because the writer's explanation is incorrect. Like when you realise the character has had his dog for forty-five years. Hmmm. Or that no-body ever, ever needs to use the toilet. We can believe our hero can shoot the eyelash off a gnat at 150 paces, but surely he must need to go to the loo occasionally?