Eliminating karma means to have karma eradicated and transformed. Of course, karma resists, and one will have tribulations and obstacles. However, the karma of thought will directly interfere in one's mind. Therefore, there are thoughts of condemning the teacher and the Great Law, or some indecent thoughts and swear words. When this occurs, some practitioners will be at a loss, and even believe that they themselves think this way.
Some people also think that it is caused by spirit possession.
However, it is not caused by spirit possession, but by the reflection of karma of thought in the brain. Some people's Main Consciousness cannot control themselves and follows the karma of thought to commit wrongdoing. Such a person will end up in failure and drop down. In this way, this shows that this person can be saved, and can distinguish good from bad. That means he has a good enlightenment quality.