No, I am not materialistic and do not have the usual accoutrements of materialism. E.g. have never had a TV in my adult life and do not understand why people do. Certainly would never tolerate a machine running commercials trying to sell something to me.

Plus, on many occasions it was not out of distress but just out of thin air. No trigger no nothing. As with anxiety - started completely unprovoked and ended for no apparent reason. Of course, I am glad it went away!