Well this was something!
I shall "categorize" this as another short.
I am actually not sure what to make of it, since the old man suddenly going berserk was surprising, yes, but I am not sure whether to laugh or be afraid. Not sure what to make of it, can't really explain better. :S
I noticed from the comments that you can move the heads of the characters (non-planned feature.) While you could say it is a "mistake" on your part, I found myself watching the clip second time to just mess with the heads. Pretty neat "easter-egg" if you ask me!
This is one of those animations which I can not really say much except "I like it."
As a short as it is, I can't really figure out much to improve on it. Don't think there is anything!