Howard actually twines his fingers and cracks his knuckles, his grin betraying exactly how excited he is to show off that he knows something Sherlock doesn't (very). And he sidles up a bit closer to John.

"Actually, to be totally correct, I'm pretty sure they're Utah raptors. About ten feet long, big hooked claw on each foot, hunt in packs of five to seven. More closely related to birds than they are to lizards." He gives Joan's statement an approving nod. "They're big trouble. They run way faster than a human can and they're smart as hell."

He smirks at Sherlock. He's got to find an upside to being stuck in a gladiator ring with carnivorous dinosaurs somehow.