add: NextActivity = MAKE_WORD (IN_INTERPLANETARY, 0) | START_INTERPLANETARY;
context: InstallBombAtEarth (void){	BYTE clut_buf[1];	DoTimePassage ();	LockMutex (GraphicsLock);	SetContext (ScreenContext);	SetTransitionSource (NULL);	SetContextBackGroundColor (BLACK_COLOR);	ClearDrawable ();	UnlockMutex (GraphicsLock);		clut_buf[0] = FadeAllToColor;	SleepThreadUntil (XFormColorMap ((COLORMAPPTR)clut_buf, 0));		SET_GAME_STATE (CHMMR_BOMB_STATE, 3); /* bomb processed */	GLOBAL (CurrentActivity) = CHECK_LOAD; /* fake a load game */	CurStarDescPtr = 0; /* force SolarSys reload */}