That’s Boris Karloff riding off on a mechanical horse.
This footage was shown at the end of Mario Bava’s 1963 film Black Sabbath, but only in the Italian version. In the English version, they cut the scene out, according to coolasscinema.com:
But in the original Italian version, we close out with this ending monologue from Karloff decked out in his Wurdulak costume — “So there it is. Didn’t you see that end coming? There’s no fooling around with ghosts, because they take revenge. Well, we’ve come to the end of our tales… so, sadly, I must leave you now. But watch out on the way home. Look around you, look behind you… careful when you open the door! And don’t go in without turning on the light! Dream about me! We’ll become friends!”
The camera then backs away revealing Karloff atop a fake horse as film technicians run around giving the illusion he’s riding passed trees. This light-hearted, comedic moment was discarded from the US print, which closes without any final words from Karloff. Instead, it goes straight to the end credits backed by a lighter toned Baxter composition that sounds similar to the sort the man created for the Roger Corman-Poe pictures that were popular at the time.