RickRoll

You can Rick Roll your users with one simple tool, the 'at' command.

Example:

at \\REMOTE_HOST 15:31 /INTERACTIVE "c:\Program Files\Internet Explorer\iexplore.exe" http://your-fav-rickroll-site.com

Make sure to set the time option to something in the future, otherwise the task wont run as its time is in the past.