No, one doesn't need to take a class to learn to donate (and receive) a reg with a long hose, but I still believe it is worthwhile to have someone show you in person rather than learn from the Internet. To do it fluidly, untucking the excess, without the hose hanging up on anything, how to hold the hose/reg so the recipient can most easily grab it, when to check to make sure the recipient is okay, positioning yourself relative to the recipient, etc., takes a little know-how and practice. Sure, you can just shove the reg in the recipient's face and hope for the best, and it will probably turn out pretty much the same, but why not learn and practice an actual procedure--a sequence of actions?