From the Akashic DVD series, Madame Blavatsky, the Unknown Years.
While it is well known that HPB had a long-running feud with the spiritualist A. O. Hume, relatively few know the roots of the feud.
It all began one afternoon when Madame Blavatsky was paying a visit to Mr. Hume. They were in the library on the second floor of his house and she sat in an antique chair near the door. Unfortunately the combination of the immense gravity of her person and the age of the chair combined to cause the chair to break under her, causing Madame Blavatsky to roll down the stairs, roll through the hall of the dwelling, roll out of the front door, down the stairs, in the process crushing to death the three ladies of the evening who were coming to give Mr. Hume his weekly massage therapy, and finally ending up-ended in an open manhole, her bloomered legs waving in the air, so shocking one of the local clergy that he ran around in circles screaming something unintelligble but people were used to him doing that and merely assumed that he was practicing his next Sunday's sermon.
And she was stuck there. In fact, she was so completely jammed into that manhole that two teams of draft horses could not dislodge her. Ultimately, in desparation, they borrowed a compressed air machine from Mr. Keely and managed to create such a high air pressure underground that Madame Blavatsky popped loose like a champagne cork, flew fifty feet into the air and came down the shrubbery outside of the local lodge building of the Mystic Knights Who Say Ni.
The two never forgave each other for that incident.