Dinosaurs happen to be excellent jumpers.
Not a well-known fact, but one the t-rex was proud of. His father had once cleared an entire canyon in a single leap, so clearing a line of cactuses at several running leaps isn’t much of a feat.
He’s pretty proud of his choices, regardless of that. It’s not a bad pastime, for something he made up on the fly when he was super bored and lonely, and far away from his pod during a big migration. Now it was a fun hobby, a way to keep his legs limber.
He’s so good at it he’s begun to teach the younger members how to jump over them before they end up bumping butt-first into the spiky tops of them.
He’d teach them to keep their feet free of spikes and their heads in the clouds.