We've all done it - the lightning-fast transition into the cool waters of Barton Springs awakens an animal instinct, making it an almost foregone conclusion. Wait …. Did you think we were talking about peeing in Barton Springs? Shame. No, we're bragging on Martha Grenon's photos of swimmers in Barton Springs which will inspire a new generation of under-the-water eye-openers. Grenon's photos are like a dazzlingly meditative and musical poem in the vein of an Esther Williams aquamusical.