Velomobile QuattroVelo 004 - Downhill speed control using only the rear disc brakes

In this video, I go down a hill applying only the rear disc brakes lightly but continuously to control the QuattroVelo's descending speed. I only touched the front brakes a couple times to stop a bit harder. The rest of the time, the rear brakes were more than enough to keep the velo from accelerating too fast. None of the brakes overheated.