I can't remember the exact number any more, but I was some big round number like a billion or something'th person to ever enter Disneyland, in I think 1989. They gave me a Sony Walkman.
I* was the 100,000th graduate of my univeristy.
*And everyone else who graduated that year.
A new car. They had a flashing banner, but it went unclaimed for some reason.
https://xkcd.com/570/
And as xckd is always relevant, if you go forward 3 comics you get one referencing rickrolling!