He's looking over his shoulder
Because they're poor conductors! (I know they're called Engineers but cut me some slack, I thought of this in the 9th grade.)
So they don't get a concussion while bobbing their from head side to side as they are saying "I don't know " whenever you ask them a question.
OC He looked inside Santa's sack.
Haloumi!
Nah, I must stay.
You better not make a habit out of this.
Guaca**mole**y edit: how do I make it not say this joke is Dirty
Head and shoulders.
He made a Freudian slip
Neapolitan.