Astronaut S. David Griggs waves to Orbiter during EVA

51D-04-025 (16 April 1985) --- Bearing a maze of interesting reflections, this aquarium-like scene came during one of the lighter moments of emergency extravehicular activity (EVA) aboard the Earth-orbiting Space Shuttle Discovery. Astronaut S. David Griggs, waving from the cargo bay into the flight deck, earlier participated with astronaut Jeffrey A. Hoffman in the successful attachment of two special tools to the end of the Canadian-built Remote Manipulator System (RMS) arm. The Earth's horizon appears both in the background of the scene and in the reflection in Griggs' helmet visor.