Spinosaurus snatches a hipsilophodont right out of a tree!
Sorry your information is outdated. Yes for many decades paleontologist thought that Hypsilophodon's long fingers and toes enabled it to live in trees. But this was based on an incorrect reconstruction of it's hind foot, which suggested it could grasp and perch. It is now recognized as a ground dweller with a conventional ornithopod foot. Hadrosaurs and Iguanodontids are also closely related ornithopods and they can't climb trees either. ;D