Of course we quickly found the answer (thanks, Google), including pictures from the TV episode where it was first used.
Anyway, I thought of that hand sign immediately when I saw the cast they put on my younger son, 2 of 2.
In case you're curious, he wiped out on his scooter and when he put his hand out to break his fall, he broke his pinkie and ring fingers. The doctor said it was a Salter 2 fracture, and the orthopedist said that they had to be immobilized to give them a chance to heal properly. You can Google for Salter fractures if you are curious.
Live long and prosper,
Dad
