The story
Named in reference to an illustration in the paper by Daniel Gilbert et al. that introduced the paradox. They consider a commuter who has the habit of walking to destinations within a mile of her origin, and cycling to more distant destinations. Since the bicycle is faster, the commuter will reach some distant locations more quickly than nearer destinations (region beta in their diagram), reversing the normal tendency to arrive later at more distant locations.
Etymology from Wiktionary, CC BY-SA 4.0.