This video says about itself:
The Smell of Prey – Walking With Dinosaurs – BBC
An insight into the hunting habits of one of the most successful breeds of Dinosaur, the Allosaurus.
From Science News:
Stegosaurus landed a low blow in dino brawl
Fossil shows that allosaurus was maimed by tail spike attack
3:19pm, October 22, 2014
The allosaurus fossil contains a circular hole in its pelvis flanked by a well-preserved, fist-sized abscess where the infected wound spread. The only murder weapon around that time that would create the circular hole is a tail spike on a stegosaurus.
The plant-eating dinosaur used its flexible body to whip its barbed tail into the allosaurus’s crotch during a fight, proposed paleontologist Robert Bakker of the Houston Museum of Natural Science on October 21 at the Geological Society of America‘s annual meeting. The allosaurus didn’t die right away, probably limping for weeks expelling pus, Bakker said.
The research could help scientists learn the fighting styles of the two dinos and reconstruct how the two species might have interacted.