Does a push have to go in a specific direction, and can it push Bystanders or enemies into your zone?

Question

Accepted Answer

A push has no general rule of its own. The effect that causes it sets any limits, and if it names no direction it can go any way. Bystanders are not enemies, so enemy-only rules do not cover them.

Marvel Zombies: A Zombicide Game

Does a push have to go in a specific direction, and can it push Bystanders or enemies into your zone?