Dave glanced up as someone wandered over, but since the guy hadn't seemed all that interested (and who would be, really? Grown man drawing circles in the dirt with a stick. What was interesting about that?), so he let it go until he heard the guy calling out a hello.
"Oh, hi," Dave called back, pausing with his drawing. He knew himself well enough to know that multitasking was right out, and that he couldn't draw and talk at the same time without messing up one or the other.
He could, contrary to popular belief, walk and chew gum at the same time. But only if he was careful about it.
"I'm just drawing a circle. In the dirt," he said, bobbing his head a couple of times in a nod. "In case that's what you were going to ask next."