It's not bias I am looking at a guy's foot get stepped on, and was skeptical believed the standard story before doing this. Not sure what u think you see in third frame. Center frame he is bringing his foot up, maybe, before it gets stepped on!
I don't think we can get to a positive answer this way. You are right, center frame Butler
is bringing up (and back) his foot, before "contact." I've watched this a few more times now. You just can't prove from a head-on view this theory that he stepped on his foot. The bottom of the three shots above could be stepping on, or in front of, his foot.
Final point, stepping "on" his foot would preclude Gabriel's plant-foot digging into turf, so I assume you're postulating contact to the side of Butler's foot?
Just curious about exactly what your theory is. Check the mechanics of those three shots in the context of the video clip - like I said, the general flow of the play has Butler springing backward, and your second pic has him beginning that motion before what you're saying is "contact."
So in this one play, at least, Butler is torched by the time of what you think is contact.
Nothing against you, I think what you're seeing is akin to this:
Feet are close to each other. One guy springs back. We spring back when hurt. Therefore, one guy stepped on the other guy.
On the other hand, Butler seems to be guessing left (from our perspective) based on the head fake. He might be springing back to avoid contact. For whatever reason, in your second picture above, his foot is already coming up in his "spring-back" maneuver. So you're postulating that, having begun this spring-back (frame 2) it goes south in frame 3 because he is tripped up by contact.
That still puts Butler way out of position (which to your credit you do acknowledge)... all we're quibbling about is whether you can establish contact resulting in Butler looking sillier because he falls down while allowing the catch.
It's indeed a close call, but that lead foot looks much more likely to be simply coming down on turf to me. It would be another matter if it never dug into the turf or was significantly deflected. I didn't see that happening.
All that said: that play just proves that sometimes the other guy beats you. That's not his whole body of work, and nobody with half a brain (the Foxboro brain trust qualifies) is going to knock down an offer by 20% or something based on that one play.