When I was in high school, a pep rally consisted of two or three girls waving pom-poms and trying unsuccessfully to get a small crowd to yell "Win team win." Times have changed.
Some serious planning, choreography and hundreds of hours of practice must have gone into this routine at Walden Grove High School, Sahuarita Arizona. Worth a few minutes of your time unless you are a complete grouch.
Via Boing Boing.
Reposted from last year to add this year's equally-spectacular production:
If you're going to watch, you should definitely click the fullscreen icon in the lower right corner
This link goes to another view of the performance filmed from closer to the court. And if you search YouTube you can find a "making of" interview video. These kids practice every day for a year to prepare these performances.