I suffer from motion sickness when I read on the bus. And the first couple times I tried to sketch on a bus, I had the same problem. But I’ve persisted and, it seems, I’m becoming able to do quick sketches on the bus. It’s a bumpy ride on a bus so I’m learning to study the subject as I bounce along, adding lines at the stops.
These are not great sketches, but I’m starting to have fun doing it. Here are four I’ve done recently. All were done in an inexpensive 4×6 notebook I bought from the dollar store, though it cost $2 (grin). I used a Noodler’s Creaper flex pen to do the paper scratching. A waterbrush with a few drops of fountain pen ink added was used for shading/color.