This is in NO way a joke, spam, trolling, or any crap like that. Now are their crotch peices shaped like that for a reason? How come Optimus' is flat, but Sentinel's is pointy. I was expecting them to be alike, but obviously they are not. I think Sentinel's crotch peice shows his character appearance well, Sentinel is a "pointy" robot if you look at him carefully, and Optimus is more flat, if that makes sense. So was it designed like that on purpose, or just coincident? AGAIN, this is NOT a joke, I actually find this an interesting topic.