see the equivalent of a first film, you are going to see the equivalent of charlie c chaplin and buster keaton showing up. it's going to be a lot of fun. and everyone creating venues or creating events ought to consider how v.r. or a.r. will be a part of what they create. i feel like robbie's -- i feel like silent disco is a brilliant example of virtual reality. it's where you are virtually creating a space. using only one modality, using hearing. virtual reality as it's advancing is sight and movement, etc., but that's exactly the kind of application we are talking about. imagine a parking lot with a renaissance fair or with a circus or whatever it is. so, together with everybody excited to see how it all turns out. thank you. [applause] >> you see we have a wide and very interesting bunch of panelist, and give you a sense of some of the challenges they faced and with turned what would be a challenge into a business model. since that is sort of the substance of things, i would like to go a little deeper and ask, do any of you have another example of a challenge you faced specifically and how