Lifts stopped working, so that even if you were lucky enough not to be trapped between two floors, you had the unpleasant task of finding your way down hundreds of flights of stairs.

After starting in the automatic mode, the progress bar keeps updating the status of the task until it is stopped by using specified time interval and percentage increment values.

Dogs not given a treat licked their mouths, yawned, scratched and showed other signs of stress and stopped performing the task, Range said.