Because of his ghost half, Danny appears slightly translucent in human form, and has a faint glow to his skin in dark rooms. On top of that, his “image” seems to shift occassionally. One of the students that sit behind him in class noticed this once when Danny raised his hand in class and watched his arm distort with the motion. That student avoids him like the plague now.
*He body distorts and another arm shoots out of his back to grab her*