The Running Seminar

Olivier Blanchard on Stan Fisher:

For a number of years, the informal thesis seminar was replaced by a running seminar, in which thesis students would run with Rudi and Stan around the Charles River. One of us would be asked to present his or her work while running. When the argument became too involved, Rudi or Stan would accelerate the pace to force the speaker to slow down their presentation. It made for simpler and clearer presentations.

Also explains why a 280 character limit has some advantages.

 Hat tip: David Beckworth