[Austexican]

Build a trebuchet. This is a forum for builders, right? The trebuchet was the ICBM launcher of pre-gunpowder medieval Europe. It was used to destroy castles. You have a big weight on one end of the lever and a massive object in a sling on the longer arm of the lever. You trip the trigger and you sling that engine block at the target of your choice. Some years ago a group of builders planned to launch a live cow, but PETA or the ASPCA filed suit. The builders decided to launch a decrepit grand piano instead. I'll bet that made one hell of a racket, but it could sound no worse than my sister doing scales for the piano teacher.