You can teleport a dorf onto a tower 10 z-levels up, and then collapse it.
Also, I recall an old bug (maybe fixed, maybe not) about dwarves being stuck in stasis being unaffected by anything, including demons and the fall of the fortress itself.
Well, in the Battlefailed example, the miners who were trapped "in stasis" did not starve or thirst. They weren't affected by anything whatsoever, actually, so when a forgotten beast destroyed the fort, the last suspended miner was the sole survivor and released mostly so the poor fool could finally die.
So, you wouldn't need to remove the dwarves' need to eat, drink or sleep except to lighten your work load so you can concentrate on the experiment.
I think Wierd's idea of dropping them off a bridge several stories up and tapping the space bar to pause/unpause is most likely to get them in the air safely. You could also hit the period key for a frame-by-frame.
I'd also suggest letting married migrants settle for about one month before tossing them. That should give them plenty of time for initial copulation.
[edit]
I suppose we should just be glad Girlinhat didn't jump in on that conversation; recalling what she's done in the past, she would have gone with my "drop a million pregnant women off a really high tower and hope one of them gives birth before she hits the ground" idea.