What was your biggest /facepalm moment?

I did the same with the dead Jedi on Taris.

Oops.

I think the most /facepalm Moment I have ever seen is when you see people in General asking how they get Lightsabers. or when they ask why they (commando, gunslinger etc) cant equip the Lightsabers. It happens so often...

I just imagined that and laughed so hard I choked.

Theres been a few, worst one was on Dread Master Brontes in HM (before we had it on farm), during the transition phase with the spinning lightning beam and the droids. Went to tab target the third droid and pressed force leap and leap right into Brontes herself, needless to say i didn't survive and caused a wipe. Still chuckle about it today

Choked, huh? Maybe someone found your lack of faith disturbing?

My biggest moment was my grind to Valor 60 on my Juggy. It was a Huttball match.

I just got the ball, was excited, and running. I wasn't being attacked at all, and kept going. I was so tunnel-visioned, so focused on the game, that I hit the finish line! I kept running back and forth across it, but the point wouldn't register. I thought I might've had to throw it (I'd never scored a goal in Huttball. Which is amazing, considering I've played in Beta.) I threw the ball, and the ball then resets. No points. I sigh, then look at the Chatbox.

"Wrong goal" seemed to be filling the chat.

TL;DR I was so excited to be carrying the ball that I ran to the wrong goal and didn't even notice it.

I still haven't done much with operations, but that reminds me of my first time through the heroic in the Black Hole dailies. At the puzzle at the end, for some reason (maybe it made me think of the 2 person datacron on Balmorra) it just looked like the goal was for the group to click all three buttons simultaneously. At least one other person in the group made the same assumption. So there we all are just mashing the buttons until the one person that had actually run it before told us all to knock it the hell off.

Also with that puzzle, because there was almost always somebody in the group that already had the quickest solution memorized and punched it in immediately... it took at least a couple dozen runs before I ever even looked around and noticed the pipes that the buttons were moving. That was when I finally got the group in which nobody had actually done the puzzle themselves before.

edit: I was just reminded of another. The very first time I did the mission on Dromund Kaas to find the bombs in the plaza near the cantina, after picking up the first bomb I noticed that a timer had started but I didn't notice the container light up so I just raced to find another bomb to pick up (figuring I was being asked to collect them all within that time limit) and exploded right away when I got the second one.

I didn't even notice the timer. Just strolled around grabbing the bombs and the wondered why I blew up.

Mine was only half an hour ago during a WZ. It was the one on Alderaan.

I'm currently levelling my shadow, lvl 13. I had played 2 WZs so far, had recently got myself "Force Breach" skill. And during those three WZs I wonder why I'm unable to use "Force Breach" and just ignore it. "Meh, I'll check it later." which I never did.
And then during the Alderaan WZ, I'm defending a turret and after a combat with a juggernaut, I happen to peek at my buffs. Then back to my action bars and notice: my stance isn't on.

"Gee, I wonder why my skill ain't working. Derp."
I yelled to my pillow (Yes, I had my pillow nearby. I was ripping my hair off due fact how awfully those WZs were going.) exhaled and carried on.

And I'd just like to point out that I hardly make these kind of mistakes. I've been playing since launch so I hardly consider myself a noob. I just had that momentary blackout there.

I have done that myself. One of the first times I ever did Hutball on my guardian I got the ball and got enough heals to carry it, buuut I landed up going to the wrong side and then getting chain cc'ed to death and giving the opposition an easy score.