Weird guys at the gym

There's this weird Asian guy at the gym who can't seem to follow any of the moves during the cardio classes. He frequently winds up doing something completely different from the rest of the class. Instead of doing knee raises or lunges, for example, he kinda twists in place. He also reacts very slowly to the instructions. When the class turns in one direction, for example, it takes a few second before he notices and starts to face the same direction.

Then there's this weird middle-aged fella who does his moves at an extremely slow pace. He doesn't seem to be mentally handicapped, but he does move as though he... can't. Like he's dragging himself through molasses. It's not just that he's out of shape; rather, he has the coordination of a six-year-old. It's strange.