For this picture right here, Tramain was waving his hand while the camera captured him with a short shutter speed. In doing so, while he was waving, his body was moving as well. If you look closely, you can see the background through him, exposing the fire extinguisher where his chest is.
As for this picture, Henry was caught in a frozen shot, showing him waving the scarf as if he was smashing a guitar at a rock concert. You can even see some of his hairs sticking out of his head like a porcupine. The shutter speed for this picture was 1/640.
