UFO: Small
Crew: Caesy type-things
Map: European? (You know, the Green one with Barns and Hedges and stuff?)
Final member of UFO crew glitched through wall of power source room onto external roof of UFO. Rear end of craft tileset not traversible by player soldier units, and any hit probabilities are always 0. Result? The little swine is impervious to damage or stun, until you can get him in the right place (border between craft tiles and map) to hit him!
Unable to take screenshot (tried printscreen, no good), but got the savegame if it's of any use to yous guys?
Damn, sorry Title should read V17.9. Damn this Jack Daniels