I used to work in the offices above Cavern Walks. Filming was a regular occurrence in that part of town, and on one occasion the building itself was involved in the shoot, with film people moving in and out of the building.
Returning from lunch I got into a crowded lift and as it rose someone asked in a general way what was being filmed. A young woman - one of the crew - replied in a rather condescending way "Actually, we're filming a comedy"
As quick as a flash from the back of the lift came a scouse voice. "We'll be the judge of that love".
The lift collapsed in laughter, and the woman left the lift at the next floor red-faced and chastened. You condescend to a Liverpudlian at your peril in my experience!