A spino was my sister's and my most recent 'accidental' tame. We didn't have too many materials on us and were mostly just exploring. We perch on a cliff for our pteranodons to restore stamina, and I spot a spino in the water nearby. He was only level 19. I panic a little bit, then ask my sister if she wants to try and knock it out. We start shooting at it (after spending 20 minutes finding a good spot to shoot it) and it SPRINTS AT US AT FULL SPEED. Luckily, it couldn't climb up the cliff. We shoot it for a while and it runs around a corner. We go to investigate and we've knocked it out! This has also happened with a Bronto, a Carno and a Raptor.