Jörg and Cheyenne are challenged to build a Rubber Powered Cannon! Jörg is particularly excited about the maximum carnage they are going to be able to create! Cheyenne sets about building the wheels, framework and crank for the cannon whilst Jörg sets about doing the science behind the rubber! Historical cannons had the huge advantage of being made from metal and using black powder as a propellant, surely Jörg and Cheyenne's machine won't even come close to the real thing?
Jörg and Cheyenne are challenged to build a scuba spear gun; despite having no experience in underwater ballistic builds, Jörg is the master of rubber and has a few tricks up his sleeve.
Jörg and Cheyenne are challenged to build a rubber powered cannon; Jörg is particularly excited about the carnage they are going to be able to create.
Jorg and Cheyenne build a javelin launcher; Jorg sets out exactly how he thinks they should do it, using his trusty rubber bands and wooden build.
Jörg and Cheyenne are challenged to build machines that skim stones across a lake; Jörg has built thousands of slingshots so he can easily fling stones, but whether he can make them skim across water is a different story.