Did they actually forget to take your phones? Or did they realize that you'd totally take pictures and post it to social media, ruining any future job prospects you may have had. These cops are playing a cruel game of 4D punishment chess.
It's not even just their bodies that line up in this scenario. It's also on their faces. These are the looks you make when you're about to do something for laughs and when you're about to smack someone in their smug, smiling face.