The phenomenon from the video (9-33s) involves charging a styrofoam plate by rubbing a cloth on it. This charged plate is repelled by another styrofoam plate and slides to the side when stacked on top of this plate. At the same time, this charged plate sticks to the hand. This phenomenon can be used at the beginning of a unit on Intermolecular forces at atomic level and their impact on the macro properties such as melting point, boiling points and vapor pressure. Guiding questions or question frames may help students, such as, What happened when the plate was rubbed with the cloth? Do you think the plates will behave the same way if the other plate was rubbed with the cloth as well? Why did the plate stick to the hand?