Sounds creative but has the potential for a lot of mess. Also, it would take some setting up and you may not have that long. I had an interview yesterday and literally just had enough time to put the pen drive in the computer, open my IWB file and put a piece of paper on tables. It's good to take a risk but think about whether you can manage this. At the end, it's possible that you would be taken off straight away to the interview, leaving behind quite a bit of mess. Is there a revised way you could meet the objective. Good luck.