The old man is Béla Károlyi - legendary gymnastics coach.
"Among the gymnasts Béla and Marta Károlyi have trained are Mary Lou Retton, Betty Okino, Kerri Strug, Teodora Ungureanu, Nadia Comaneci, Kim Zmeskal, Kristie Phillips, and Dominique Moceanu. In total, Károlyi has coached nine Olympic champions, fifteen world champions, sixteen European medalists and six U.S. national champions." - Wikipedia
Here's the rest of the article:
http://en.wikipedia.org/wiki/B%C3%A9la_K%C3%A1rolyi