What I like about being a concept artist is the variety of things you have to design every day from environments, characters, vehicles to objects, weapons and... haircuts ! :)
Here is another assigment I got:
"Seb, please design the Magnetiser"
"The Magnetis... what?"
"The Magnetiser! I don't know what it is, figure it out!"
"Euh...(french "hum") okay!"