Doctor who treated 7/7 victims finds Olympic closure
7 August 2012 Last updated at 13:18 BST
After a chance encounter with Dr Andrew Hartle, Lord Coe said talking to him was the most memorable moment of the Olympics for him so far and even called it seismic.
Dr Hartle said being involved in the Olympics as one of 70,000 volunteers had brought him some "closure". His role is to guide boxing spectators in the ExCel Arena.
To listen to other Radio 5 live interviews, please visit the Best Bits page.