http://www.youtube.com/watch?v=cCDWUI0Y7PY
Looks like a French national 4x100m relay squad camp travelogue in Nice…video link via PJ Vazel’s Facebook page… 
If you are interested in the upsweep relay pass definitely watch this video. Great to see footage on this.
I am a fan of it. Simple and relatively low risk. MY high school relays used it successfully when I coached.
Truly a fun video. Their practices are cool as well.
Though our short sprint teams are push-pass oriented we do a 5-step upsweep in lieu of the popular visual for long sprint exchanges. Similar to the '68Oly US4x4.
I like the way in which they start their acceleration phase, I will try it out myself monday to see how it feels.
move from the legs and hips not the upper torso.