Get him in "Down," and give him a little push while saying, "Roll Over!"
And let 'er rip:
Aaaand up he pops, all primed and ready for his treat:
Let's do that again, Pao Pao. Roll over!:
Good boy! You get another treat.
This is fun for Pao Pao, but more fun for me, I think.
How else would I get such wonderful, bug-eyed portraits of my boy?