While preparing the "Seatbelt_Model" recording, I made a mistake.  It is as follows:  At about Time 54:00 (54-min) in the Video, while discussing the "Seatbelt Pullout" from the Retractor, I should have said "The maximum rate of pullout is given by 0.01x(fed_length per time_step)".  It is not "the rate" but the "maximum rate". That is important. I might have missed the term "maximum rate".   Sarba Guha LSTC, Troy Office, Michigan, USA  June-01, 2017