Years ago when I worked in Amsterdam, one of the team was a great American guy - let's call him Bob. In the office was a copier, and when you made multiple copies of large documents, it would insert a coloured sheet of paper between them. These sheets were usually discarded, so I collected them and gave them to Mrs.L who worked in an infants school and gave them to the kids.
One day before Christmas, Bob finally asked me what I wanted these coloured sheets for. I told him that we cut them into strips to make paper chains to decorate the house and so we didn't have to spend any money. Bob was shocked and announced to the entire department, Captain, you're so cheap. This caused great peels of laughter and our project leader said that I shouldn't 'wind up' Bob as he had difficulty with British humour.