Harmless Pranks

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Not that we would endorse anything inappropriate in the office, especially not with your boss. But wouldn't it be fun to make an animated Impress presentation, add plenty of sound, and set it up to run in a loop (Making a Presentation Run in a Loop on page 731). Then put it in your boss's startup directory, or email it (choose File > Send as Email) labeled something harmless like "Quarterly Report"?