Annoyed with their reputation as slow-moving laggards, two tortoises, spotting a camera, decided to put that stereotype to rest once and for all, sprinting along merrily at a pace which, if not, cheetah-like, at least matched the speed of a Sunday shopper browsing the market stalls in the zocalo in Coyacan.

Our thanks to Shari whose fast shutter speed and trigger finger captured the action.