Husks at least had the decency to explode nicely. These aliens were weaker and just tended to hit the ground without anything even close to that.
"Sorry, ma'am! I'll behave!" He sprang back to his feet, neatly decking the alien that'd come to try and stop Shepard's advance. Wherever Ash and Garrus and otherShep were, they'd cover them, right?
It probably really helped that the aliens seemed faintly terrible at aiming. Maybe that was his overconfidence talking, but hey, a man had to keep his morale up somehow!