One of those little UFO aliens that blow up and parachute.
Wanted to take a pic, but I killed it too fast instinctually before i realized what it was.
First time I've ever seen that before.
Oh yeah...is the "Enemies Killed" screen glitched BTW? I think ti is capped at 18. I killed aobut 25 enemies the other day and it looks like when it gets to 18 it keeps showing kills, but stops the count.