During Craftmas, Ben wrote down 4 lists of 10 words, phrases, people and random things. We each had to say every item on our list during the podcast. We couldn't just say the words either, we had to incorporate the words during the dialogue.
The punishment for not completing your list included getting snowballs thrown at you. However many words were left on your list equalled to the amount of snowballs you would have thrown at you from each of the other members.