When you are working from home where children are around, things can be utterly perilous.
One professor based at South Korean university, Robert E Kelly, experienced the epitome on how children can wreak havoc to their parents' serious work.
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While live on BBC World News, a little girl wearing a cute yellow jumper ushered herself in and tried to talk to her father.
The BBC interviewer then warned Kelly that he wasn't alone. The guy, being a professional, still looked at the camera and tried to gently push his daughter away.
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Just when you thought that was the end, a baby in a walker happily followed her sister into the room.
A few seconds thereafter, a woman came flying into the room and ushered the two girls out of the door.
Oopss! She had to come back as she forgot to close the door behind her.
Watch the epic video!