I don’t know if anybody’s done this before, but…
It’s from The West Wing, the finale of season 1, a signal the staff work out to indicate that the Space Shuttle has resolved an issue while on a mission. The show is known for infusing humour into the drama — in this case, the Shuttle plot line in this episode is of consequence, but the gesture lightens it up.
A couple of us started using this signal at work to indicate if something’s working — with a similar but different, downward, gesture if it’s not. I guess it’s the latter that applies to City Loop phone coverage.
Update 5pm: There we go, I can use it to mark Turnbull challenging Abbott.
— Daniel Bowen (@danielbowen) September 14, 2015