Wait until the finally realises thats he glowing. Perhaps it’s radioactive?

Substantial change in production of this drawing by using larger 7.0 sizing for external lineart and thinner 4.0 sizing for internal lineart. 

Used averagely dark (quarter length to black) grey for base shading and applied white lighting plus darker grey shading for spherical enhancement. Greater focus on black and white rather than grey on base colours (or lack thereof) in the images (limited) colour scheme.