A Hypertube launcher capable of as much speed as you feel like waiting for, provided you don't fling yourself out of the map. Only uses 6 boosters, so it's far more power efficient than just stacking a bunch in a row, and is faster, too.

Hold A to build up speed (~5 seconds is plenty), then hold D to go. Can be angled up to make a cannon, or just hooked up to your tube system.

Could probably go way above ~60k speed on showDebug, that's just what I felt like waiting for.