Another ? about speaking in tongues.

[houston]

If tongues is not the initial evidence, why do people that do not know anything about the I.E. doctrine speak in tongues when they give their life to the Lord?

I have witnessed first time visitors cry out to God and BAM! They began to speak in tongues, with no coaching, and nobody praying with them.

My mother trembled in the presence of God. She spoke in tongues and fell forward to the ground. Describing her experience she said that she could see nothing but a bright light. I don't how she could see anything, her eyes were closed the whole time she was on the floor.