Prank caller James Tyler Markle "convinced a McDonald's worker to set off the restaurant's fire suppression system, which released a liquid from overhead extinguishers... and directed the worker to break the store's windows 'for ventilation.'"

Then he bragged about it on Pranknet and got tracked down by the authorities. 

He also did the same thing to a Wendy's, and you can listen to the audio of that prank call.

As a frantic, gasping worker busts out windows, Markle assures the man, "Sir, you're gonna be a hero." Markle, who was linked to the Wendy's call via his Skype records, has been charged with terrorizing and criminal damage, both felonies (the terrorizing count carries a maximum sentence of 15 years in prison).