[Cacophonous]

Not ALL have been disproven, but most of the most spectacular ones are bogus (like the JATO rocket story).

[KayEyeDoubleDee]

Heard the one about the Rocket Car? and then heard it was a hoax? Think again.

[Quila]

Not ALL have been disproven, but most of the most spectacular ones are bogus (like the JATO rocket story).

The JATO one actually appears to be based on a possibly true story. It used to be at http://www.geocities.com/Baja/Canyon/7665/ROCKIT.HTML, but it seems to have moved. Basically, a few kids having fun with Army surplus and dad's scrapyard, but no one was actually in the car at the time they ran it into the entrance to an abandoned mine.