Gold handcuffs and a knife

I have a class on Wednesdays, mainly comprising of a rowdy bunch of lads that I do no discernible teaching to. There is a lot of shouting, screaming and general horseplay. They must think I am some kind of Army General, such is my over the top 'strict' character for those thirty five minutes but I think it works for them as some have been motivated to work harder in the class. Despite me acting a little crazy with them in class I think they like me. Today some were on the stairwell, one of them in plastic, gold handcuffs. And a (toy) knife. I'm glad I captured this picture.