This is to protect our roof from more damages than what I suspect the roofers solicitors did last wednesday. It is the Mahakhala deity ceremony or ritual so it is fierce and chaotic. Mahakhala can be very scary.

To cut through the ego and vanquish it. He is also super compassionate. But simply wrathful. He dispells negative energies and removes obstacle. He is a protector of the dhamma, that is why he is fierce yet compassionate.