I love Youtube commenters. They're always good for a laugh. The rollercoaster one was pretty close to my initial thoughts.
I've tried something like that with a stationary cycle. I actually built on an attachment at one point, but the ergonomics just wouldn't work. Best I could manage was to reattach the panel halfway down the neck of the bike and saw off the top, allowing me to see past it (to watch movies or whatever) without craning my neck. I'm thinking about sticking an eisel of sorts on at about a 70 degree angle, but I think I'll need to build a platform under the bike to serve as a base. I'm fairly certain it's a doomed effort.