Own the rights?
A brief yet subtle "kiss-my-ass" related joke.
Mild, it seems one of the arcade games has an alien bursting through a man's chest as a reference to Alien.
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Woody call Buzz "Mr. Light-Beer"
The scene when Sid gets home and uses the alien toy as a chew toy for his dog The scene in which Sid does an "operation" The scene in which Buzz and Woody first encounter Sid's toys