The first rule you should know when offered a whole cake is to check if the squad prankster is within the vicinity. That could only mean either two things - a.) He doesn't want any part of the cake, and b.) He's already inside it, and ready to make quite a dramatic entry. Horatio definitely forgot that, despite having head chefs to prepare his Carol's Eve feast, Tykie knew a thing or two about baking more than anyone else. That at least solved Cybie and BJ's immobility dilemma on how to grab a slice.
Q: What was the worst after-party mess you had to clean up?
Cybie, Tykie, Horatio, BJ and Archie (c) Me