I recently participated in and set a new Guinness World Record for 'Longest Marathon Drumming by a Team'. During my slot, I wore my favourite headphone for drumming with, the Sennheiser Amperior, as can be seen in the following pic:
Here is a link to the official page of ACM (the music academy at which I currently teach) where the world record announcement has been made: http://www.acm.ac.uk/70-hour-drummathon-hits-the-spot/
As I understand it, the official Guinness World Record announcement will be made in the next few months. This could be a wonderful promo piece for head-fi and I'll definitely keep you posted as I hear more about it.