A humerous phrase indicating a simultanious happening.
Derived from old Western
TV shows or movies.
Something exciting would be happening out on the range somewhere (or in town, etc), but at the same time something else would be happening at the home
base, i.e. the ranch.
The bank is being robbed by Smoky
Joe and the Goatnose Gang!
Will Whitehat Willy be able to foil the desperadoes in time?
Meanwhile, back at the ranch,
little Betsy has discovered a gold nugget in the family's stream.