Examples: [Collected via e-mail, March 2013]
Origins: The meme about costumed Toy Story characters at Disney theme parks stopping and dropping to the ground whenever a guest shouts "Andy's coming!" (a reference to how the toy characters in the Toy Story movies behave, going limp and lifeless whenever their owner approaches to cover up the fact that they're "alive") was tested by Temporary Tourist. In a brief interview, a WDW cast member explains that the Toy Story characters used to respond to such signals by stopping and dropping, but the practice has since been discontinued by Disney for safety reasons.
A character attendant at WDW also wrote to tell us: