I thought Luke used a mind trick on the Gammoreans. It looked like he was gesturing them back to their posts, although one of the Gammoreans seems to hold his throat.
Then again, in the Jedi Academy Trilogy, Kyp uses the Force to rip the memories of the Sun Crusher from the scientists mind.
That's no more a spoiler today than "Darth Vader is Luke Skywalker's father!"
In Phantom Menace
, Yoda says "Hard to see, the Dark Side is" but I think mind tricks are the domain of the light side.