It's not. I show you here some slides, some frames from the video, and at the last moment before he hits the glass, he puts his feet in front, and then he bangs against the glass.
确实不会，我给你们展示这些幻灯片， 是从视频的节选， 在它即将碰到玻璃的临近时刻， 他把他的脚放在前面， 然后才重击到玻璃上。