Mechanical Dave.
He was in running mode. The sensors, which covered his man-shaped body, told him that he was running too fast. He would not be able to stop in time or turn sharp enough to avoid the cavernous crater which, up until three minutes and fifteen seconds ago, was once his assigned working quadrant for the week.
His body continued its accelerated momentum over the edge and into the air as his internal processors processed a multitude of possible programs he could run in order to find a solution to his dilemma before he smashed into the ground far below him. His circuits hummed and glowed, working beyond normal capacity, in utter desperation. If it weren't for the intense rush of air that whipped around him, his circuits would have overheated and fried. He was doing things he couldn't normally do, creating formulas that, in theory, went against known physical laws. In his enlightened yet frantic, high-speed panic he accidentally deleted his core program in such a peculiar way, that it caused him to suddenly vanish out of existence.
Poof.
In the silence, somewhere beyond the crater, a crow cawed.