Gromitspapa --
Those are very funny. I like the purple plastic nutsack hanging from the back of THE FLAME. And on the third one, the flyer, I think they de-tuned the trebuchet so the landing would happen in the frame. Too bad, properly engineered, that car could have been flung much further.
To the others in the audience similarly inclined to trebuchet fever, I'll
fling out this link.