A large percentage of the time when horses injure humans, it's because the humans do something stupid.

Despite not having a sting, the porcupine ray is capable of injuring humans with its many sharp thorns.

How on earth can they protest about hunting when they are prepared to injure humans and horses in their cause?

Shortnose chimaeras have a venomous spine on their backs, which is sufficiently dangerous to injure humans.

Lightning strikes injure humans in several different ways:

This ray is capable of injuring humans with its venomous tail spines, though it prefers to flee if threatened.

Cassie is able to turn off the gas from its control station, injuring several humans in the process.

The spine is not toxic and cannot injure humans.

Although salmon sharks are thought to be capable of injuring humans, there are few if any attacks on humans.

Microwave guns powerful enough to injure humans are possible: