Michael J. Fox was on David Letterman last night and showed off the Nike Air Mag sneakers that are being auctioned to benefit his charity, The Michael J. Fox Foundation. The Nike Air Mag sneakers are a replica of the shoes he wore in Back to the Future II.
He also made fun of Charlie Sheen, all in good fun of course. Reportedly they are friends from their days as co-stars on Spin City.
You can watch both segments of Michael J. Fox on David Letterman below.