LED jacket to stop taxi

When waving a hand, the letters "TAXI" emerge, so the taxi will stop stopping the jacket. English is somewhat inconvenient and should be stopped if it is a reversal.Clothes make the man: Yo, Taxi!
http://taswearables.blogspot.com/2006/03/yo-taxi.html

We make money not art: Cute Circuit fashion show in Pisa
http://www.we-make-money-not-art.com/archives/008525.php

How does it feel when actually used? Here is the movie.
(1.42 MB: QuickTime format)
http://itp.nyu.edu/~tra225/wearables/yoVideo_1.5.mov

It is not good unless you waving your hands at a fairly high rate ... It looks tired ...