[ah yes Regular Ange (TM) banter, he's missed it...! and likewise, instead of pursuing his initial consideration of asking her how she is (like he'd ever manage that normally anyway), he just decides to go along with her hideous joke WHY]

Oh, dear... You ran into a wall on your way out, didn't you. [makes a tutting noise!] And now you'll be a meal for the rodents. I hope you've at least brought yourself a salt shaker so they won't complain about the blandness of their supper.