I think I had the device turned on for too long and used it too much the last few days,I was sitting in my flat yesterday evening and all of a sudden this strange sensation occured,the best way I feel I can describe it is like this, it felt as if someone had hit me on the back of the head with a ball or something(but there was no one /anything there)
so for a split second that feeling & my eyes blurred and I lost balance,and then I was fine.
Later that day my friend (who owns the device) called on the phone & said"make sure you don't use that thing too much!"(a bit late with that advice!) and then he went on to say how someone he knew had an experience just like I had ...He saidthe device is attracting all kinds of stuff.
And my mother did warn me ,she said to be carefull,you don't know what you're dealing with...and she is right.

I feel much more sensitive to it now,especially sitting here at computer like a heavy pressure on my head...