The guys from the How Ridiculous Youtube channel have set the Guinness World Record for the longest basket, swishing a shot from 415 feet away, from the top of the Gordon Dam in Australia. They climbed to the top of the dam and set up a basketball net at the bottom. The ball dropped with tremendous velocity right through the hoop.
The group had previously set the record from 293 feet up in Holland. Naturally, we have to be skeptical of things we see on the internet, but this seems legitimate, as it was verified from Guinness.
Maybe these guys could play with LeBron.