hover board, college physics professor david wright teaches newton s first law, motion stays in motion. you have to be enthusiastic in the class because physics has a reputation of being dull and boring reporter: no chance of dozing off in wright s classroom. he s been sharing the gravity of the science he loves at virginia s tidewater community college since 1974 at almost 70, a magnetic machine of energy, slingshotting himself into demonstration with fire, pogo sticks and a bed of nails. i feel guilty sometimes they are paying me to have fun. reporter: one student posted this stunt montage just yesterday on twitter, already watched more than 13 million times. you have to be going into that classroom every day thinking what is this guy going to do today? yes. literally reporter: his class is a roller coaster ride and while wright gets thrills from the physics of sky diving and bungee jumping, nothing compares to teaching. look what happens. reporter: using a closet c