This is a video of an Ammonium dichromate volcano erupting with a couple mercury thiocyanate tablets hidden inside. Mercury thiocyanate is commonly sold as those "Pharoah's snake" fireworks. So between the volcano erupting and those tentacles spilling out it looks like the Kraken from hell has been awakened. As a matter of fact, if there were no sense of scale in the video I would have though this was the opening to a Sy-Fy original movie. 'Krakano' or something. I don't know, I'm just spitballing here.
Hit the jump AND STARE INTO THE DEPTHS OF HELL.
Thanks to Alex, who expressed an interest in eating one of those tentacles and should never be picked when he raises his hand to volunteer for experiments in the future.