I know. My argument really is against the law, which leaves too much ground open to the refs here. There are no instances where a guy can jump at some oblique angle and keep arms by his body. This interpretation of the law essentially creates a situation where you cannot go up in the air to block a shot. In any circumstance. If you're making a sliding challenge (Milner vs Roma last year) or you're stationary (Otamendi vs Schalke 3 weeks back) it ought to be called. Jumping should have leniency. No way to completely control your arms in these cases. Ever. Didn't they describe some system where arms are meant to be 'below 4 or 8 o'clock position' to be considered 'natural'?
Don't freaking jump (with your arms not attached to your body or worse with your arms above your head) in the penalty box while trying to block a shot on goal from your opponent while having your front (at least half of it) in front of goal. In particular not when the shot of the opponent is clearly going over the bar.
You can easily jump up in the air without imitating a scarecrow. Keep your arms below your head. Seen many such situations not being given for that very reason. When you start imitating a scarecrow you are inviting trouble for yourself as Kimpembe just did. No experienced CB would have done what he did there.
Never seen a penalty NOT being given when a defender is blocking a shot on goal in the penalty box with his arms and said arms are above his head or outside of his body as Kimpembe's arm clearly was tonight. Tough luck, youthful stupidity, inexperience etc. call it what you want it is a penalty. A clear one at that too. No two ways about it.
Not sure how anyone can argue that it was not a penalty. It was. It was just a clear gift from Kimpembe. That is what annoys some people, I guess. Blame the defender, not the rules which are clear and fair.
If that is not a penalty it opens a pandora box where every defender will be able to block shots on goal in the penalty box while in the air with the excuse of that being a natural thing (having arms above your head) when jumping. Can't have that.