CANIS

A certain fisherman [...] went to the same place again to fish, and he put a row of hooks on his heels in case he met the Púca again; he attached them like a horseman's spurs. When evening drew near, he made a halter of the fishing-line for the Púca. The Púca met him the second time. He himself caught the Púca, put the fishing-line over his head like a halter, and started to ride him. He drove him wherever he wanted to go, and he kept putting his heels with the hooks like spurs to the Púca's sides, so that the Púca was shedding blood from the pricks of the hooks.

Excerpt from "The Púca: A Multi-Functional Irish Supernatural Entity" by Deasún Breatnach