Seriously. I tested it, and it happened 2 out of the 3 times I tried it (and also worked for someone else in another zone).
I even have pictoral evidence (check the damage totals in the 'sucess' box on the right)
Most likely this is because the entity is 'shieldless'. The third time I tried it I may have hit a shard instead, as it only did 13,000 damage; but the previous two times ramming speed did 333,000 damage to the entity causing it to simply die instantly.