During the movie, Dean Kamen joked that he should be credited as the "official clapper." The final scene in the movie alludes to this with a sequence of Dean Kamen clapping and the credits do in fact list Kamen as "Clapper."
The uncredited pundit who says that the Segway failed because, "at $5,000, it's a pretty expensive toy," is Patrick Olsen, Editor-in-Chief of Cars.com.