Once you have "press your face down on a pillow and a shriek loud," he said. Already you can put pillow floating aimlessly in front of the people you have to dislike the most, and will give you a 50% increase in happiness.
Once you have "press your face into the pillow and scream loud" successfully, you can grab a pillow in front of the person you hate most. And it makes you happy, up 50%.
When you "press your face down on the pillow, and scream out loud". All you can pitch a pillow in front of people you dislike most. And will make you more happy 50%.