The word paradigm means a new way of looking at old ideas. When a religious movement as a whole has experienced this new paradigm, everything changes. From the beginning the Charismatic movement had no core theological foundation. They actually believed that their theologies did not really matter, but that unity could be established on experience and a kind of simplistic view of the rest of the Bible. It's easy to see how this has led to Toronto, Pensacola, and even worse manifestations of the paranormal.
Experience is always the one changeable source that nothing can be established upon.
From this foundation of shared experiences, the Charismatic world has shifted from one trend to another. Almost every phenomenon or trendy idea or experience has moved like a tidal wave from Charismatic church to Charismatic church. There has been a long list of these different trends, most of which did not last long and always left a trail of the discouraged, disillusioned, and disgusted. Many classical Pentecostals have been victims of the same trends and ideas. These same kinds of fanatical experiences surfaced at other times during church history, especially in times of revivals where there was no solid theology base as a point of discernment.