Interesting, didn't know there were so many uses for SOP.
Don't recall anyone using it for anything other than standard operating procedure. Must be a military thing......

If all the above fails you can try this:
SLowly floor the pedal (as Carbkings article says to avoid squirting fuel into the carb)then while cranking slowly let up on the pedal. I've used that procedure successfully before too.

Good luck
Dave