Villagers generate angry particles when a panda is hurt near them (MC-140813). However, this behavior is also exhibited when the panda is behind a wall that the villager is near.
How to reproduce:
Spawn a villager
Make a wall near the villager
Spawn a panda behind the wall
Hurt the panda
Sorry for the bad screenshot; i was trying to capture the moment when the villager made particles.
This does not need to be a different report for a minor difference.