Taking a Video/Snapchat video while riding a wave?

Was thinking of buying a sturdy, waterproof case for my iphone to take videos and pictures when I have a surf sesh but have never seen anyone taking videos with a phone while riding/catching a wave. I've only seen people with GoPros taking videos of other people riding waves. Has anyone on here tried taking a POV video of riding a wave (while holding a phone in one hand!). Also, I think it would be sick to Snapchat catching a few waves (for those of you who don't know its a social media app for sharing pictures and videos). Though i think I would get a couple of judgemental looks from other surfers if I brought a phone out.. 
