I was playing around with 12w50b and spawned some Iron Golems so they can attack Endermans. When they killed a few, they started to move their arms up and down and walking in circles.
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FALSE - If you make the Iron Golems, they don't attack. Working as intended. 🙂 - FALSE
Sorry. Worded that wrong. This ISN'T working as intended. 😛

Wait, what? xD