Sometimes, when breaking a block, the animation will be (completely) black or green. This doesn't always happen, but occasionally happens.
Steps to reproduce:
1. Place fence
2. Hit fence multiple times, animation will eventually turn all black, may take only one try.
1. Place fence gate
2. Hit fence gate multiple times, animation will eventually turn all green, may take only one try.
Mod edit:
Reasons found so far:
Thunderstorm
XP orbs near by
Duplicate of: MC-47725?