This bug pertains to the over speedy Baby Zombie Pigmen (which probably holds true for the baby zombies too) as well as the incorrect rendering of their swords in their hands. I wont go any further into the speed bug as this has happened back in 1.6 and is pretty self explanatory. However, the sword rendering may need some explaining. Where most pigmen have their swords upright, the baby variant have theirs slightly tilted forward.
MC-70424
Baby Zombie Pigmen's sword slightly tiled forward
Resolved
Fixed
1
Community Consensus
Minecraft 1.8, Minecraft 1.8.8, Minecraft 15w43a
Minecraft 16w38a
Retrieved
Running too fast: Works As Intended, they are supposed to be annoying.
Adjusted ticket name.