But that's not a fact. The officer was wearing black gloves, which made it appear that his hand were in his pockets. If you look close at a high definition picture, you can tell the difference. Also, if you watch the full video, you will see him moves his arm, and it shows his hand was not in his pocket.
And this highlights a key point. What we think we see is not always what actually occurred. Until a cause of death has been released, we don't know for sure how Floyd died. Let's see more of the facts before we make final conclusions.
Maybe he thought Mr. Floyd had some sort of top-secret SEAL training that would enable him to get out of any hold, even while cuffed behind his back.