User blog comment:Kiadony/Turian husk in ME3 trailer?/@comment-737801-20110120140520/@comment-1746153-20110121171237

That image is indeed blurry, but if you watch it in HD and pause several frames, you can see that that creature is turian-shaped (when it falls, you can see its lower half rather clearly, and it is quite recognizable), and it runs sort of like a husk. Of course, we can't be sure yet.