Yesterday, I posted some videos about big wave surfing, and in the third one, you can see two guys riding the same wave synchronously. So Cate asked in her comment if something like "synchronal surfing" exists. I think that there isn't such thing, especially because most waves only breaks into one direction, never heard of it, but that doesn't count as a response, so I searched it in the internet - and didn't find anything. So if anyone has infos on that - please tell us!
But, there is another form of surfing that has now been oficially accepted by the international olympic comitee: tandem surfing!