He seems to stammer with too many uh's and ah's. A few sessions in a
Toastmasters club might help him to ...uh...stop it. Every time a
club member says "uh" or "ah" when speaking, they ring a bell. After
a few dings you soon find yourself deleting the "uh's" and "ah's".

Fortunately, he doesn't perform on the bicycle the way he performs
during interviews.