I'm bored and have been surfing YouTube when I stumbled on this:
http://www.youtube.com/watch?v=TayllyRKoZo#t=2m28s
I always LOVED doing the William Tell Overture at football and basketball games at school. I remember the first time I did it (at Chief Illiniwek's last game!) and being like WHAT IS HAPPENING!!?? But it was so fun! Seeing the video put a big smile on my face
I then started looking at related videos and found some other REALLY cool traditions (particularly involving some sort of dance, song, action, etc. that EVERYONE knows).
Here's another two I found that I really liked:
Wisconsin's Jump Around
http://www.youtube.com/watch?v=tODlPxhbGF8
I just love hearing how crazy the crowd goes within seconds of the song starting
A high school one, but still pretty cool - "Parting the Red Sea"
http://www.youtube.com/watch?v=Zc6sJT8I2bw
What were some of the fun traditions that your schools' fans did at games? (I'm not necessarily talking about a halftime performance or anything like that--everyone has something like that.) Post videos if you have them!