For many people, the tree is one of the most exciting parts of Christmas – but be mindful if you spot a brown, walnut-sized hard clump that looks a bit like a pine cone – it might not be as innocent as it seemsFor many people, the tree is one of the most exciting parts of Christmas – but be mindful if you spot a brown, walnut-sized hard clump that looks a bit like a pine cone – it might not be as innocent as it seems