[khedoros1]

There are a couple of frames where the pinky disappears, the ring finger becomes the new pinky, middle becomes ring, pointer becomes middle, and a new pointer appears from behind the middle finger as he puts his hand down.

During that time, the reflection that was the tip of the pinky becomes the reflection from his shirt, and the tie reflection that becomes visible first appears bent to the viewer's left, and shifts rightwards to match with the now-visible tie and shirt in the next frame.

It all happens within 5 frames. Pause the video, and period and comma can be used to advance and reverse frame-by-frame.