Ruby Powered Rocket
From Homestar Runner Wiki
The ruby-powered rocket is a rocket in Dangeresque 3: The Criminal Projective that Professor Experimento made. It's powered by a ruby, which Sultry Buttons later stole. Prof. Experimento told Dangeresque that someone stole the rocket's launch codes (the culprit turned out to be Perducci). Dangeresque uses it to get to Craig's base on The Sun. Strong Bad plays Space Circus Catastrophe to make it look like he was flying through space.
In reality, the rocket is a poorly constructed prop made out of two rectangular pieces of cardboard, taped with masking tape to a triangular piece of cardboard representing the nose cone. On the back of the rocket, several smaller rectangles have been attached with flames drawn on. One of the "flames" is actually the second page of the Space Circus Catastrophe Manual. The ruby itself is actually just a piece of ring pop candy.
 See Also
Dangeresque 1: Dangeresque, too?, Dangeresque 2: This Time, It's Not Dangeresque 1,
Strong Bad: Dangeresque