Hopefully Alex would hear it and unplug his computer.
When you are finished processing, unplug the motor, remove it from the container, and dish out the food that you have prepared.
Unplug any appliances which are plugged into the sockets.
First, unplug the microwave from its power source.
If you unplug your USB cable before the syncing process is complete, this can also cause problems with the iPhone sync process.