The 1914 GAH had “The Little Joker” - “A special trap with no restrictions as to angles, height, or distance for throwing targets gave contestants opportunities to try their skill between events.”

[Linked Image from photos.smugmug.com]

The 1915 GAH advertised 2 “Joker” Traps
https://digital.la84.org/digital/collection/p17103coll17/id/24921/rec/41

and again in 1916
https://digital.la84.org/digital/collection/p17103coll17/id/23301/rec/31