That is the correct thing to do. Same in a airplane. Never inflate or in this instance place on your lift jacket on YOU until out of whatever you are in is going down . They lift you up the aircraft or boat is going down they end up trapping you (in this case on the canopy in the case of an aircraft the roof of the cabin) Am serious if you are in airplane going down and someone inflates it inside the cabin you would be doing said person quite a favor by ripping it off him her and other passengers they can impede escape of others It was msnbc a couple of days the captain , when he realized it was over did unlatch or however the canopy is attached. It will be a year or so but i would bet when get where folks were sitting we will find that more were from the front that got out -- where he unlatched it if posted sorry they are do the retraction of the vehicle live here -- caution it is not a fast moving entity!