Because you haven't put enough effort into your Christmas lights until your family is in danger.
From the submitter:
(actually a trick - the hole in the ceiling is actually a box that is supported by the top of the tree which was cut flat)
Dammit. You had me going there...
Scanner bracing the Christmas tree up against the wall after one of the base legs broke off. Oh, and the tree skirt is a blanket with snowflakes on it.
It must be that time of year again!