@ Washington
I thought The Wave was invented in Oakland.
This is what AI says:
The Wave was invented by professional cheerleader "Krazy George" Henderson at an Oakland Athletics playoff game in Oakland, California, on October 15, 1981. Henderson perfected the wave during earlier events, including a hockey game in 1980 in Denver, Colorado, and an Edmonton, Canada game the same year. The first documented and televised use of the wave was during the A's game, which became the event that launched the wave's widespread popularity.
Edit:
AI also says this:
Though Henderson's wave was the first documented version, the University of Washington also claims a version of the wave at Husky Stadium on Halloween 1981. However, the side-to-side motion seen globally today is widely attributed to Henderson's 1981 A's game.