My friend's experience

Hello again, fellow ATSers.

This is my second post.

I convinced a friend of mine to meditate too and he saw something weird.

The first days he saw nothing but a small white ball.
After a few days of focussing on that ball he started to see some weird landscape.

The ground was gray and there were black objects on it.
I think they are the roofs of buildings as he was seeing it from above.

This is all I know about his experience.

Anyone who might have an idea about this?