David Darling sent us several images, created by his son Jeff, to accompany his appearance on the 6/08/11 show.
1) A Doomsday asteroid, 8 miles wide, on a collision course with Earth.
2) An Earth-like planet begins to melt as a nearby star explodes.
3) An artificially-created black hole in the early stages of swallowing our planet.
4) Nanotechnology nightmare: San Francisco being reduced to "gray goo."