R
Found these two short clips on You Tube. They are short but there is some on/off throttle in both vids...enjoy!
http://www.youtube.com/watch?v=0ADm9NBYH8w
http://www.youtube.com/watch?v=jJjbUnsIn0w&feature=related
http://www.youtube.com/watch?v=0ADm9NBYH8w
http://www.youtube.com/watch?v=jJjbUnsIn0w&feature=related