Anyone who pre-ordered RotHC got a holo statue of Dr. SomethingOrOther the Hutt, when summoned, he functions as a universal class trainer. He sticks around of 1 minute and then has to be re-summoned. He used to go, "HaHA!" in a happy hutt voice when you activated him, but for some reason that went away with the last patch (hope it's back in today's).
There are a couple other holo statues that do the same thing in cartel packs and on the GTN.
"I can't buy a pack of smokes without running into 9 guys you've ****ed!"
At some point in the first few days after the expansion became available to people, I was on the fleet and I looked at my map and there must have been 3-4 dozen trainers spread all over the place because of people activating their statues.
Anyway, like others have said, I also tend to call mine out wherever I am when I level.
"This ain't like fieldwork. You never have to notarize a man and kill him in triplicate. Well... Almost never..." - Ruby