These are all terrifying, all of them. Giant horse-eating anacondas EVERYWHERE.
Well, MC and I were riding on the road over the weekend, and one of the lines WAS ACTUALLY A SNAKE. Taran and Paddy both took a HARD look at the rat snake desperately slithering across the road trying not to get trampled, but were otherwise not impressed. The snake was definitely more afraid of them than they were of it.

Not actually as scary as imagined.
So next time your horse tries to convince you that there's something terrifying lurking in the bushes/log/car/tree/road/ditch/manhole cover/patch of flowers, you should probably believe them!