Bungee, boats, and a lot of water.
Sounds like the recipe for something awesome.
They guys from ThrillSeeker 5K Stunt Run posted this video of them having a little fun out on Lake Powell creating a real life human slingshot.
Watch and rejoice.
Pro Tip: Don’t run the bungee rope between your legs. Watch at 1:30 to see what happened when someone did.