Continuity mistake: Tron sends his memory disk to talk to Alan. After Tron communicates with his user Alan1, Alan sends him back the disk with new data on it to destroy the MCP. When Tron receives the disk it is like a Frisbee, solid on the top and hollow on the bottom. When he receives the disk the hollow part is on the bottom. He holds the disk in front of him and starts talking about "the key to the new order". The shot changes and the disk has been reversed, hollow side toward him and solid side away from him. He did not have time to rotate the disk. (01:08:10)
Trivia: Director Steven Lisberger had several arcade games scattered all around the sets. The cast and crew often had to be called away from them to return to shooting, particularly Jeff Bridges, who would often claim he was "preparing for the next scene" in order to keep playing a bit longer.
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