i can pop my elbows simultaneously by putting my arms up in a sort of guarded stance, fists clenched, and then flexing my forearms while pushing out a little towards a perceived opponent. it's very reliable if i haven't done it in multiple hours. i should probably come up with some entire choreographed sequence involving taking my shirt off, rolling my neck, windmilling my arms, bending my knees, the elbow pop, and then one of those non committal chin thrusts with a shrug followed by some kind of phrase like, "let's get down."

just in case.