I worked for the Blazers for one season when I was 14yrs old.
I saw an article in Popular Mechanics magazine, it was about a guy who made a remote control blimp. Tracked him down and bought a 6ft helium filled blimp for him. Flew it in the lobby of the old Blazer offices by Lloyd Center. Got hired on the spot. $50 a game, two tickets, and a tiny dressing room in the Memorial Coliseum. Would fly it across the court during a timeout during the 4th quarter while the organist played the theme to the Lone Ranger. Cool gig, got to bring all my friends to games. Looking back I feel sorry for my parents, always having to drop off and pick me myself, friend, blimp, and a giant tank of helium to games, lol.
Anyway, the Blazers decided it was cheaper to buy their own blimp and because of a few times I lost control of the thing the NBA put in rules that blimps couldn't be flown during the game.
So I was the first person to fly a blimp at an indoor sporting event.