Trivia: There was a false page in the original script in order to fool all of the people working on the film. This was to keep it secret that Darth Vader was Luke's father. Only George Lucas, the producers and James Earl Jones knew the truth. Mark Hamill was told just moments before filming this scene so his reaction would be right, while David Prowse read the lines from the original script "Obi-Wan killed your father."
Trivia: In the first take of Darth Vader and his troops entering the Rebel base, the lead troopers tripped, a stuntman stepped on the cape of David Prowse (Darth Vader), the cape tore free and Prowse fell on the troopers.
Well I for one didn't know about it, so it's interesting to know it happened. Behind the scenes stuff is generally valid trivia.
Other mistake: In the ending credits, Denis Lawson's name is misspelled "Dennis." The filmmakers made the same mistake in "Star Wars."
Suggested correction: And in the Star Wars corrections page, you will find that mistake with the explanation that Lawson has used both Denis and Dennis in his career.
Continuity mistake: During the battle of Hoth, Wedge flies a full circle around the AT-AT walker and when the walker begins to fall, you can see the cable around its legs, but in a side view of the walker falling, the cable is nowhere to be seen.
Suggested correction: The cable is thin and we only see closer in shots until the walker falls, but you still can see it, barely in 1080p, right as the head hits as a line between the top of the front leg connecting to the back leg.
Suggested correction: Mark Hamill stated multiple times that he knew for over a year about the twist. It was a secret for the remaining cast though.
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