On Falador certain things may happen once. These are some notable achievements off the community. If you have any information laying around please feel free to let us know!
First person to reach 99
We kept track off the first 99, and on V2 the first person with 99 is '1', yes just 1 (The skill was Magic) His alt account has the second, also 99 magic, named '2'.
First Person with 1B skill
First Maxed person