Zombies Are Runners

"i saw everyone making mods that add new zombie mobs...

but what if we just made vanilla zombies act like the Common Infected from Left 4 Dead?

so... i made it myself! >:333
(thx Valve for Left 4 Dead)"

this mod brings Left 4 Dead behavior to vanilla zombies! now they can break through glass, climb iron bars, fences and walls, "ledge grab", and more little changes to their visuals, sounds, and behavior bla-bla-bla

the goal is to make vanilla zombies feel more like actual infected from Left 4 Dead without replacing them with completely new mobs!

"About versions"

1.0.0: added the first common infected behavior

1.0.1: bug fixes and zombies can now survive falls from up to 10 blocks without taking fall damage
reduced fall damage taken by zombies from higher falls