Plot hole: Towards the end, Patrick takes the 5kt bomb into a helicopter and climbs it away to safety. The problem with that is that the helicopters have a rather low rate of climb - ~10 m/s for military helicopters, less than that for civilian ones. This is the rate of climb at low altitudes, and it is with altitude. He had less than 5 minutes to climb, which would put the bomb at most 3000 meters above the city, and more realistically, one tenth that - just about the optimum height for the bomb to inflict major damage on the Vatican city and the center of Rome.
Angels & Demons (2009)
1 plot hole
Directed by: Ron Howard
Starring: Tom Hanks, Ewan McGregor, Stellan Skarsgard, Ayelet Zurer
Other mistake: After Langdon saves the last of the Preferati by diving into the fountain, he heads off to St. Angelo with dry clothes. Since it is only ten or fifteen minutes later, his clothes should be soaked.
Richter: You said they'd be killed publicly.
Robert Langdon: Yes, revenge. For La Purga.
Richter: La Purga?
Robert Langdon: Oh geez, you guys don't even read your own history do you? 1668, the church kidnapped four Illuminati scientists and branded each one of them on the chest with the symbol of the cross. To 'purge' them of their sins and they executed them, threw their bodies in the street as a warning to others to stop questioning church ruling on scientific matters. They radicalized them. The Purga created a darker, more violent Illuminati, one bent on... On retribution.
More trivia for Angels & Demons
Question: When Langdon and the Italian cop are trapped inside the sealed room of the Vatican archive and the air is shut off, how long could they actually survive in a space that size? In the movie, they start to suffocate almost immediately. (There is no long time lapse because the movie's plot depends on defusing the bomb within a few hours).
Chosen answer: In reality, they would have perished from CO2 poisoning long before the room ran out of breathable oxygen causing them to simply suffocate. Without knowing the exact dimensions of the room it is impossible to give any time more specific than "several hours" for this to happen in a room as big as that one appeared to be.
Phixius ★
I just re-watched the movie, and as Langdon and Vittoria enter the room, it's mentioned to them that the oxygen levels are always kept at a bare minimum to protect the ancient tomes and documents stored there. That helps to answer my own question about why Langdon and the cop were so quickly affected when the power was shut off.
raywest ★