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The oxygen alarm in his EVA suit - warning of too high oxygen levels - is what wakes up Mark after his impalement by the Hab's antenna.

Though, in fairness, it was still being used far longer than NASA had intended. It's highly unlikely that NASA would allow a structure subject to pressure cycles like an airlock to be designed with a single-point failure that could lead to loss of crew. The author admits this, but " most people don't know how Martian dust storms work. This is even brought up later in the book when the second dust storm hits.

An atmospheric pressure 2% that of Earth's at sea level means even a 175 km/h wind would have little effect on the MAV, the com antenna, or the Hab. The initial windstorm that prompted the mission scrub that left Mark stranded.Weir himself freely admits that, although he pushed as hard as he could toward the diamond end of the Mohs scale, he went ahead and just went with plot needs for a few things: Artistic License: In any book that pays this much attention to detail, there are inevitably going to be a few details that are questionable.In fact, his entire reason for recording the log in the first place is so that something of his story would survive if he did not, and it became a habit. Apocalyptic Log: A couple of Mark's mission log entries are recorded at a time when there's a high probability they'll become this trope.Anthropic Principle: A lot have things have to line up just right for the story and for Watney to get home.Again at the end, when Lewis reports, "Houston, this is Hermes Actual.In this case, "Mission Control" is a conference room crowded with people and computers, because the old Pathfinder mission center has long since been repurposed. Everyone cheers as Pathfinder's signal arrives, letting them know Mark successfully revived it.Ambiguous Disorder: Rich Purnell takes everything extremely literally, with sarcasm flying right over his head, and has poor social skills.The book begins on Sol 6 and ends on Sol 549.

Alternate Calendar: The mission is counted in "Sols", as a Martian day is thirty-seven minutes and twenty-two seconds longer than an Earth one.

The real problem is filtering out the carbon dioxide, not getting enough oxygen. And of course, at the start of the novel, he almost dies from too much of it, which he notes as being especially ironic. Oxygen was actually one of the few things Mark had an adequate supply of throughout his ordeal, since there was an oxygen maker, although there were a few cases where the problem was to access it. Mark: Pride parade probe coming to save me. She was a Greek goddess who traveled the heavens with the speed of wind. JPL: By the way, the probe is named Iris. Mark doesn't believe in, nor does he meet any "Martians". Mark is Genre Savvy that he's stuck on Mars and stories about Mars have featured Martians, so he mentions Martians now and then, but it's only for the Rule of Funny.

Absent Aliens: Despite being titled "The Martian" there are no traditional Little Green Men or the like - it is the human stuck on Mars who is the eponymous "Martian".

The novel contains examples of the following tropes:

"The Earthling", Mark begins keeping a journal detailing his struggles adapting to life back on Earth, and he has a reunion with an old crewmate.

because his car broke down in western Texas after he forgot his phone charger. "Car Trouble", Mark writes his mom to tell her about how he got out of a tense situation when he found himself marooned in an inhospitable desert with no way to call for help."I Made It", Mark writes a letter to his mom letting her know he will be going to Mars, and assuring her of how safe he will be.