[Olefin]

Be an interesting weapon to use for sure -you have all kinds of interesting debris around to throw - especially if they start to throw things like cars or boulders or big chunks of concrete with re-bar in it - not sure if even a tanks overhead turret armor could handle a massive boulder landing on top of it thrown over a large distance by a trebuchet - thats a pretty big amount of mass to handle going at a pretty good clip when it lands

and you dont even have to throw a whole car - I would hate to see what your average engine block would do to what it landed on after geting launched by a catapult

although throwing a cow has the "Run Away!!!" aspect - maybe even have rude French defenders making fun of you