At first I was making fun of Derf's Jockeyphobia, but I'm starting to hate th bastards with a vengeance myself now after playing a bit more on expert. Every time I heard one of them giggling and one of us is slightly away from the rest (like outside a room) I'm thinking "shiiiit". On normal difficulties they're kind of ok, but on expert the common infected hit so hard that steering a survivor in their direction for 20 seconds can have disastrous consequences.

Jockeys have a preference of pushing survivors into witches and boomers and spitters too. Crafty bastards. But a charger in a dangerous spot can be just as horrible really.