Sirr meditation with the name Ya Batin. I’ve read somewhere that repeating this name three times a day will make one able to see the truth of all things. I guess I was overdosing on that three times a day mark, today 
My first impression: a tingling electric pulse around the temples of my head.
The visuals: walking inside of a dark tunnel, no source of light. Underneath my feet I could hear and feel the flow of a forceful river, rumbling beneath the concrete of the tunnel. I decided to follow the source of this river, walking into the opposite direction of its flow. I blacked in and out of this impression. At some point I was facing the end of the tunnel, marked by a shining blue waterfall that gave life to the river under this whole construct. I could hear somebody whispering “All rivers are flowing upwards here” and when I looked up I could indeed witness the river flowing back up into the waterfall.
My heart tingled in a very soft and mellow pulse, similar to the one around my head.
I will try the “three times a day” approach, I think.