Starcrossed: Part III - S2-E26
Continuity mistake: The surveillance video of Hawkgirl talking to the Justice League is different than what we saw in the previous episode. She doesn't move towards Bruce in the video, people are in different positions, and Clark has glasses on in the video.
Continuity mistake: When the Thanagarian commander addresses the delegates in the locked room, there is a guard standing in front of the door, next to the projection. In the next shot, he has moved to the side by the wall.
Answer: They're a warrior race, when something gets in your way, you either ignore it or smash it to pieces.