Stegosaurs have in the past been presented to us as lumbering plant eaters, but in reality they were lethal fighters when necessary, according to palaeontologists who have unveiled new evidence of a casualty of stegosaurian combat. The evidence is a fatal stab would in the pubis bone of a predatory allosaur. The wound – in the conical shape of a stegosaur tail spike – would have required a great dexterity to inflict and demonstrates clear signs of having fatally wounded the allosaur.
http://www.heritagedaily.com/2014/10/ku ... aur/105341
Dinosaurs were obviously far quicker and dexterous than previously thought