Portal themed Christmas tree

Now this is one interesting Christmas tree that will definitely have all Portal fans out there smiling away. It certainly does take a fair amount of effort, especially to ensure the upside down portion of the tree remains stuck on the ceiling nicely, at least until the Christmas decorations around the home are taken down. There is just one Christmas tradition that cannot be implemented with this Portal inspired Christmas tree though – did you notice that there are no presents at all? I suppose the force of gravity would have ensured the presents no longer remain under the tree, but somewhere in the middle, so it would be better to leave it present-less instead.