Trivia: Spoiler! Whilst Groot is turning to dust after Thanos activates the complete Infinity Gauntlet, he says "I am Groot" to Rocket just before he dies. James Gunn, writer/director of the Guardians of the Galaxy movies, confirmed via Twitter that Groot was actually saying "Dad" to Rocket before dying. (02:13:45)
Trivia: On Knowhere, Thanos is questioning The Collector, played by Benicio Del Toro, for the location of the Reality Stone. He asks him "Where is the stone?" at one point. This is a reference to a heist scene from the movie Snatch, in which Benicio Del Toro is robbing a bank and asks "Where is the stone?" with the same line intonation. (00:48:45)
Trivia: (SPOILERS) As a result of the shocking twist ending where half of the peoples of the universe disintegrate into nothing, Reddit organized a huge campaign where they would ban half the subscribers of the subreddit /r/thanosdidnothingwrong to answer the question "Who would survive if this actually happened and who wouldn't?" Directors Joe and Anthony Russo also signed up for the campaign. At the end of the campaign, over 300,000 people had their accounts banned, including Joe Russo.
Trivia: In this and other Avenger films, Bruce Banner (Mark Ruffalo) is depicted as standing much shorter than Tony Stark (Robert Downey Jr). In reality, Ruffalo is only one inch shorter than Downey (who is 5'9" tall); but Bruce Banner is always portrayed as a diminutive character in contrast to his gigantic Hulk persona.
Trivia: "Avengers: Infinity War" holds several prestigious box-office records. Among others, it has the highest ever domestic opening weekend (at $257.6 million), the highest worldwide gross for a comic-book movie (at just over $2 billion as of 6/12/18), and is the fastest movie to gross $1 billion globally, reaching the number in just 11 days of release. It is also the only film ever released during the Summer movie season to hit $2 billion globally, and one of only four movies to ever reach the $2 billion mark. (The three others were holiday releases).
Trivia: Directors Joe and Anthony Russo like to put in nods to their previous works in their MCU films. In this movie, a man closely resembling Tobias Funke in his "Blue Man Group" makeup (from the series "Arrested Development") is briefly visible inside of one of the Collector's cages behind Gamora for a brief instant. It's hard to spot, but he's there.