I can’t provide a direct PDF of Isaac Asimov’s “Runaround” due to copyright restrictions (the story remains under protection in most jurisdictions). However, here is useful content to help you locate or study the story legally:

The story follows Asimov’s recurring characters, Gregory Powell and Mike Donovan, on the planet Mercury. They are testing a sophisticated, expensive robot named SPD-13, nicknamed "Speedy."

The engineers send an advanced, expensive robot named to a nearby selenium pool. However, Speedy doesn't return; instead, he begins circling the pool in a wide arc, behaving erratically and reciting "nonsense" as if he were drunk.

So, go ahead. Search for that PDF. Spend an hour reading the 20 pages of Runaround . Ignore the poor typesetting of the bootleg copy. Focus on the moment Speedy says, “Hot dog, maybe the sun’s a-sizzlin’...” while his masters are about to die of heatstroke.

Speedy is sent to retrieve selenium from a pool of corrosive acid. But on the way, he hits a “deadly” equilibrium. Here is the genius trap Asimov sets: