FWIW, here's a video of a woman being tased for 5 seconds and she's able to walk immediately afterwards:
http://www.youtube.com/watch?v=B2eSvsTbXIE
Heres another:
http://www.youtube.com/watch?v=beN0fjVy718
And theres a lot more on youtube if you just search for taser. I've looked at about 8 and so far I haven't found one where the person who was tased couldn't move afterwards.
I'm gonna go out on a limb and say that the UCLA kid was just being melodramatic.