If you use Sniper Shot on an enemy and one of your NPCs kills that enemy before the shot gets off, you become stuck aiming at where they enemy once was. This has happened to me twice now, and the typical unstuck commands do not work, you simply respawn still aiming at where it was. Since the enemy is dead, you will never fire your weapon, so you are simply stuck standing there aiming. You can still use all your skills, but you can't move.
This has happened to me aswell. I was fighting a group of enemies and one of my away team members killed the guy I was up to shoot at with "Sniper Shot". The character animation froze (while the shot was still displayed charging in a never ending cycle...) and I couldn't move anymore - changing weapons, choosing a different attack and so on didn't end this. I had to beam to my ship and down to the planet again in order to go on with the mission.