Sketching people in dark sketchbook.

Still trying to find  easiest material for this thin paper. Used first brown 5.6 Rosetta pencil, but it was too weak, than Shorty with 7B lead - weak also. This guy was looking at me with such fierce force, I got the message: I see what you doing! - that I was really worried he'll attack me, even I knew, I probably beat him up, he is smaller than me.