Ah, Island Kids...
My friends kids built this "Trebuchet" catapult for a local science fair. So far they have launched softballs and similar objects, but think what it would do with a Molotov Cocktail!
And for the extra-large version, watch this piano launch from the TV show "Northern Exposure". I was told a local log home builder and his crew built this one:
If you like what these kids built, please go to their YouTube page and leave a nice comment, I'd like to pump up their views. They really worked hard and did all the welding, bolting and assembly of this cool device.
Here's their YouTube page:
Trebuchet catapult link