Hiding From the Boogeyman
Perhaps this father’s motive for sitting in a trashcan is to teach his child a lesson in humility by demonstrating that some people live in such conditions. Or he may be playing a prank and waiting to jumping out like a life-size jack-in-the-box.
Nevertheless, he must have taken the time to clean and disinfect the bin beforehand. Because while this may be a harmless joke or fun session for the father, it could pose a severe health risk to the baby.