Most demos I do comes to some approximate of:
Me: OK, tower has cleared us to takeoff, I'll use the rudder pedals to get you good and lined up on centerline, whenever you're ready go ahead and smoothly push the throttle all the way forward... Ok great, I'll go ahead and put my hand on the throttle now, airspeed is indicating good, alright now gently start pulling back on the yoke just enough to make the airplane do a wheelie, and that will get us into the air...
Me: Pull back a bit more...
Me: a bit more...
Me: Alright we're nearly 3000' down the runway we should be airborne any moment now... (meanwhile I'm giving the yoke on my side a little 'pinky motivation'). There we are, in the air, good job!