In this episode, host Tim Shaw investigates why things do what they do. First, Tim heads to a deserted parking lot with a group of baseball players. They are tasked with firing baseballs at targets from a pitching machine mounted on the back of Tim's jeep - which will be speeding past the targets at 35 mph. Then Tim shows us what will happen to two party balloons in a moving van - one filled with helium tethered to the floor and one filled with air, tethered to the roof. Before the end of the episode, Tim will also attempt to blow up diaper bags and fill a car tire to its bursting point.