I have got somewhat overwhelmed by rocks travelling horizontally because they had already jeopardized the launching of a missile. It is on the internet. Jeopardize in a way which it put in jeopardy; hazard; risk; imperil: the lives of the military at the base. The missile exploded in middair at the launching site. On another occasion one of those weird rocks darting horizontally cut the left wing of an airplane of FAB- Forca Aerea Brasileira, brazilian air force. i told the pilot survived for having ejected himself out of the plane. It was crowded on the air field while people enjoyed the demonstration. A teen age boy died two miles away from the metal fragments (debris) which fell onto his humble house.