When you're stressed out, sometimes it's best to just be left alone. People can often tell when you're stressed out and need some space, but mechanical devices such as a Roomba vacuum cleaner don't have such great powers of perception. Unless you hack them, that is.
This modified Roomba has been hacked to know when its owner is stressed out and is likely to kick it across the room if it tries cleaning around them. Instead, it steers clear when it senses stress, only cleaning your apartment when it knows you're in a fine mood. If only everyone was so perceptive.