VIDEOS:
Voyager's Holodeck History
The macroviruses end up causing the computer to manifest the greatest hits of Voyager's holodeck history, and for added fun makes the holodeck safeties "random". Worse, the entire ship has been outfitted with holoemitters as part of its museum conversion, so the characters have free rein.
Example of:
Holodeck Malfunction
Example of:
First-Episode Twist