I was getting ready to go to sleep — finally! — when Barnum, as is his habit of late, indicated he needed to go out. (He always has to go out right when I’m about to turn in.)
I took him out. I have very carefully not been giving him the cue to pee (“Hurry up!”) until he is in the act of peeing or has just started to squat.
However, before I release him to relieve himself, I tell him, “Release. Free walk!” Which means, you are not working now, you are free to sniff things and relieve yourself and generally be a dog, as long as you keep a loose leash.
Because I’m so dang tired, instead I said, “Release. Hurry up!” And he gave a little start and sniffed out a spot and peed, right away!
Weeeeeeee! (No pun intended.)
Sharon, the muse of Gadget, and Barnum, empty SDiT? (or is that SDiPee?)
After Gadget 
Yay Barnum! I remember the first time I gave Mdog the “empty” command preceding the event was in the middle of a rain storm, and he was trying to find some location in the 5 foot circle allowed by the leash that he could pee without getting wet. I told him to empty and he gave me the face that he makes when hes figured a problem out, and peed.
Ah yes, the lightbulb moment! They are great.