(at around 29 mins) Lee puts a Band-aid on the scratch on Hugh's eyebrow. A moment later, when they are discussing the photo of Amir, the bandage disappears. On the next shot, the Band-Aid reappears.
Just before 1:22:00, Emily was wearing a coat which she took from another Emily in her car. While her friends are watching the comet, Emily is suddenly not wearing her coat, notably when she sees another Emily crawling into the bathroom.
(at around 1h 6 mins) When Hugh is calculating the different outcomes on his iPhone, you can see from the display that he has reception - which they claim none of them has.
(at around 7 mins) Right after Hugh asks everyone at the table about their phone reception but before he starts talking about the comet from the 1930s there is a brief shot of Lee saying something. A cameraman can be seen crouching behind the sofa in the living room to the left of Lee's head..
At 1:23:42, toward the conclusion of the film a boom mic is visible. When Emily leaves the bathroom and collapses, a boom microphone is visible entering the scene on the right under the archway then pulls back out of sight.
At 7:29, they are discussing the comet and Lee brings up "Haleys" comet, which is a common mispronunciation. It is Halley's comet. While not entirely out of character for a novice to do, the fact that most dialogue is improvised makes it the performer's error.
The performer is a real person playing a fictional person who is subject to the same foibles as the person portraying them in the same time frame. Anyone who grew up in the early years of the post early rock'n'roll era (60s, 70s) would be familiar with a band called Bill Haley and his Comets (Rock Around the Clock). This became an association in the mainstream conscience that the comet was named after someone named Haley, rather than Halley. Those who grew up with this mispronunciation passed it along to their children, friends, etc. Thus, anyone who grew up with the misnomer, even if they self corrected at a later date, may be subject to mispronouncing it unconsciously, particularly while drinking alcohol.
The performer is a real person playing a fictional person who is subject to the same foibles as the person portraying them in the same time frame. Anyone who grew up in the early years of the post early rock'n'roll era (60s, 70s) would be familiar with a band called Bill Haley and his Comets (Rock Around the Clock). This became an association in the mainstream conscience that the comet was named after someone named Haley, rather than Halley. Those who grew up with this mispronunciation passed it along to their children, friends, etc. Thus, anyone who grew up with the misnomer, even if they self corrected at a later date, may be subject to mispronouncing it unconsciously, particularly while drinking alcohol.