A very interesting topic and I hope the members would not find my views offensive.
When the mind conquers one's body totally, you can say that he is in trance. It is important to note that this trance has nothing to do with the Lord. It is his own thoughts and mental actions that have gripped him.
For example, just tell yourself that you are sad, miserable, unworthy etc constantly, and you will realise people asking you whether something is troubling you. Your face and actions will start to reflect your thoughts. When one constantly think of certain objects or person and when he fails to connect himself with his own reality, he becomes his thoughts.
This usually happens to people with weak minds, usually those who do not have a conviction of what they are. As they are very confused, they lose their identity. This has got to do completely with the mind, which is subtle in its nature. Therefore, allowing the subtle energy be it good or bad taking over them.
It is the same principle whether you get trance during Thaipusam or possessed by a ghost elsewhere. And usually this trance lasts until the mind gets reconnected with its own self. So, when you see your friends getting into trance of Muneeswaran, Muniandy, Kali etc, just know that they are not the gods. Since they constantly think of them, they become their characteristics for some time. A very very Good example would be how Jothika becomes Chandramukhi in the movie, Chandramukhi.
So, don't think that the 4D which made you rich instantly, is given by someone in trance. You will never know 'what' has given you that 4D, and remember nothing comes free. This is my advice out of my experience and of some people I know.
The important fact is that the nature of trance is attributed to ones mind and has nothing to do with the Lord. The only way to get rid of it is to make the mind more strong by having the right knowledge of oneself.