Maybe its a 2 stage rocket. First the tube launches, and from inside at a certain time, several smaller rockets pop out into a rain of smaller explosions.
JesusK said: Maybe its a 2 stage rocket. First the tube launches, and from inside at a certain time, several smaller rockets pop out into a rain of smaller explosions.
The point being that the rocket is in the tube; it isn't the tube itself. Launching a cylinder from a square would be a bit silly.