Funny you should mention that. In a lot of airlines they have a "sterile cockpit" policy that requires both pilots to only talk about the job at hand (getting the plane on the ground) once they go below some nominal altitude, often 10000ft. This is because landing a plane requires intense concentration by both pilots despite all the on-board computer wizardry that's supposed to make it easier. The last few seconds are especially crucial, and distractions in that phase of the flight constitute a real risk. They say there are only two kinds of pilots: those who have landed with the gear up, and those who are going to. Too many pilots have been distracted at the point of putting the gear down and forgotten to do it; staying out of both categories is really hard work requiring constant vigilance.

Actually, if you read Jane Austen (written early 1800's) you'll find she mixes up it's, its, her's and so on. The present day apostrophe-for-ownership conventions are merely that. Not to say I like it much when they are ignored in such cavalier fashion, but at least one can say there's precedent.