With 1,000 liters of High Test Peroxide onboard to power its rocket engine, the 1,000-mph, 2014 Bloodhound SSC could become a bomb if temperatures within its tightly packed fuselage get too high. Each liter of HTP has roughly the same explosive force as a stick of dynamite when it starts to decompose at 40°C (just 104°F). That means cooling the system is not only hugely important, but also massively challenging, when you consider that ambient temperatures routinely hit 100°F at the Hakseen Pan in South Africa where the Bloodhound SSC’s initial trials will begin. The fact that the supercharged Jaguar V-8 — which pumps 900 liters of HTP to the engine in just 20 seconds — is situated right next to the HTP tank further complicates matters. Oh, and temperatures inside the hybrid rocket engine will hit 3,000°C.