BBH London recently debuted its first work for U.K. supermarket Tesco, and now it's taking things to a frighteningly funny level with a Halloween-themed campaign.

The retailer recently transformed one of its stores into a "Spookermarket," outfitted with pranks designed to freak out customers as they made their way through the aisles shopping for fresh fish, toilet paper and other goods.

For example, shoppers asking for cuts of meat got a shock when butchers emerged with scary Joker faces, others in the frozen food section encountered shopping carts that seemed to move on their own, while those looking for toilet paper deals got more than they bargained for.

The pranks were captured in an online film and drive viewers to other videos showing them how they can spookify their own homes for Halloween. For example, it offers tutorials on how to make a "head in a jar" or a "severed hand" display, which serve to illustrate the tag, "Every Little Helps." See more of the brand's holiday instructionals on the Tesco YouTube channel.

The films were produced out of BBH's in-house production studio, Black Sheep Studios.