Automatic PFD Manual Inflation

How to manually (orally) inflate a Mustang Survival MD3184 automatic (Hydrostatic - HIT) Personal Flotation Device. I started wondering about this after automatically inflating my PFD by jumping into a pool at a US Sailing Safety at Sea Seminar. Once I packed it back up how to get at the inflation tube was no longer obvious. I believe oral inflation is a requirement for ORR races such as Marion to Bermuda. More info about this video here: http://savvysalt.com/blog/automatic-p... Filmed with GoPro HERO4 Silver and Sony Alpha A5100. Audio recorded with Tascam DR-05 audio recorder and JK MIC-J 044 Lavalier Mic. More filmmaking information here: http://savvysalt.com/blog/film-making...